Google 昨天晚上发布了对标ChatGPT 的自己的A.I. chatbot，名字叫Bard。
虽然之前在发布会的时候出了差错让Google 母公司的市值损失了$100 billion, 但毕竟目前的这些A.I. chatbots 研发的方法论都是基于Google 当年的论文的，所以Google 的Bard 还是值得期待的。事实上，昨天Alphabet 的股价也涨了。
所以不妨看下Bard 和ChatGPT 写出来的文字有什么差异。 今天刚好是TOEFL 的考试日，所以我们就用下今天的TOEFL 独立写作考场题 题目 20220322 You may choose between two professors who will be teaching a course that you must take at your university. If the following statements are the only information available to you about the differences between the two professors, which professor would you choose? Why?
- One professor was voted most popular in a survey of students about their teachers.
- One professor has just been given an award for outstanding research.
下面是当直接输入题目时候两者给的回复 From Bard
Bard 是直接给了3个Drafts 的回答，ChatGPT 也可以生成不同的回复，点击“Regenerate response” 就好 From ChatGPT
目前的这两个回复，从TOEFL 考试的标准来说，都还是不够好的，因为都只是观点，不够有细节展开。 然后我让Bard 和ChatGPT 都进一步展开下自己的回答
From Bard [总字数 316]
When choosing a professor for a class, there are many factors to consider. Some students might prioritize a professor's research experience, while others might prefer a professor who is known for being an engaging lecturer. Ultimately, the decision of which professor to choose is a personal one. However, there are some factors that can help students make an informed decision. One factor that is worth considering is the professor's popularity with students. A popular professor is likely to be a good teacher, as they are able to connect with students and make the material interesting. This is because popular professors are often seen as being approachable and helpful. They are also more likely to create a positive and enjoyable learning environment. This can make a big difference in how much students learn and how much they enjoy their time at university. Another factor to consider is the professor's research experience. A professor who has a lot of research experience is likely to be an expert in their field. This can be helpful for students who are interested in pursuing a career in academia or who want to learn more about a particular topic. However, it is important to remember that research and teaching are different skills. Just because a professor is an excellent researcher does not mean that they are also an excellent teacher. In fact, some professors who are excellent researchers are not very effective teachers.
Finally, it is important to consider the professor's teaching style. Some professors are more lecture-based, while others are more discussion-based. Some professors are more traditional, while others are more innovative. It is important to find a professor whose teaching style is a good fit for your learning style.
[对于考试来说，建议不要写这一段，因为teaching style 不是题目讨论的内容； 除非建立起来了teaching style 和popular 或者research 之间的关系]
Ultimately, the decision of which professor to choose is a personal one. However, by considering the factors above, students can make an informed decision about who to take a class with.
From ChatGPT [总字数 371]
The professor who was voted most popular by students may have several advantages. Firstly, being popular with students suggests that they are likely to be an engaging and effective teacher who can effectively communicate their subject matter. It is also possible that they have a teaching style that resonates with students, making the learning experience enjoyable and effective. Additionally, a popular professor may be someone who is accessible and approachable, making it easier for students to seek help or ask questions. However, there are also potential drawbacks to choosing the popular professor. Popular does not necessarily mean that the professor is the most knowledgeable or qualified to teach the subject matter. In some cases, popularity may be the result of a professor having an easy grading policy or a low workload, which may not necessarily be beneficial to students in the long run. Additionally, popularity may be driven by factors outside of the classroom, such as the professor being well-liked personally or having a reputation for being lenient. On the other hand, the professor who has just received an award for outstanding research may also have several advantages. Firstly, their research accolades may mean that they are up-to-date on the latest developments in the field, and may be able to bring cutting-edge research into the classroom. This could provide students with a unique and valuable learning experience. Additionally, an award-winning professor may be someone who is passionate about their subject matter, which could translate into an engaging and inspiring teaching style. However, there are also potential drawbacks to choosing the research-focused professor. Firstly, a professor who is heavily focused on research may not necessarily have the same level of skill and experience in teaching as a professor who prioritizes teaching effectiveness. Additionally, It is also possible that a professor who is highly focused on research may prioritize their own work over their students' learning, which could result in a less engaging or effective classroom experience. In summary, both the popularity of a professor among students and their research accomplishments could be relevant factors in your decision, but there are potential drawbacks and limitations to both approaches. Ultimately, your choice may depend on your own priorities and learning goals for the course.
相比于最初的回答上面的版本已经有一定的展开了，但实际上细节还不是很多，还是观点为主，上面的蓝色部分更多还是观点句。ChatGPT 的相对字数多（371>316）也不是细节展开多，只是观点多了些罢了。
两者的细节展开能力到底怎么样呢？ 最后的一个比较是针对某一个段落去展开例子的能力。 段落是之前Bard 生成的一个段落。
下面是 Bard 给的例子 【406 words】
A professor with a lot of research experience can be a great asset to a class. They can share their knowledge and expertise with students, and they can help students to understand the material in a deeper way. However, it is important to remember that research and teaching are different skills. Just because a professor is an excellent researcher does not mean that they are also an excellent teacher. In fact, some professors who are excellent researchers are not very effective teachers. There are a few reasons why a professor who is an excellent researcher might not be an excellent teacher.
First, research and teaching require different skills. Research is about finding new information, while teaching is about sharing information with others.
Second, research and teaching require different motivations. Researchers are motivated by the desire to learn new things, while teachers are motivated by the desire to help others learn.
Third, research and teaching require different time commitments. Research can be a long and time-consuming process, while teaching requires a commitment to being available to students on a regular basis.
【这一段都是说理】
Despite the fact that research and teaching are different skills, there are some professors who are able to do both well. These professors are able to combine their love of research with their passion for teaching. They are able to find new ways to share their knowledge with students, and they are able to help students to understand the material in a deeper way.
If you are looking for a professor who is an excellent researcher, there are a few things you can do. First, you can look for professors who have a lot of publications. Second, you can look for professors who have won awards for their research. Third, you can look for professors who are well-respected in their field. If you are looking for a professor who is an excellent teacher, there are a few things you can do. First, you can look for professors who have received positive reviews from students. Second, you can look for professors who are known for being approachable and helpful. Third, you can look for professors who are passionate about teaching.【这些和讨论的话题关系不大】
Ultimately, the best way to find a professor who is both an excellent researcher and an excellent teacher is to talk to other students and to read reviews of professors. By doing this, you can get a sense of what other students have experienced with particular professors.
下面是ChatGPT 给的例子 【340 words】
Research experience can be an important factor to consider when choosing a professor for a course. For example, let's say you are interested in a course on neuroscience. A professor who has published many papers in neuroscience journals, has received research grants, and has presented their work at national and international conferences would likely have a lot of research experience in the field. This experience could be valuable if you are interested in pursuing a career in neuroscience research, as the professor may be able to provide guidance and advice on the path to becoming a researcher. However, it is important to keep in mind that research and teaching are different skills. A professor who is an expert in their field may not necessarily be skilled at explaining complex concepts to students or creating an engaging classroom environment. For example, a professor who is a brilliant theoretical physicist may struggle to communicate their ideas to undergraduate students who have little background in the subject matter. Additionally, some professors who are focused on their research may not have as much time or energy to devote to teaching, which could lead to a less engaging or effective classroom experience. In some cases, a professor's research experience may even detract from their teaching effectiveness. For example, a professor who is highly focused on their research may assume that students have a certain level of background knowledge or understanding, and may not take the time to explain concepts in a way that is accessible to all students. Alternatively, a professor who is highly focused on their research may be less willing to spend time on teaching-related tasks such as grading assignments or answering student questions outside of class. Overall, while research experience can be a valuable asset for a professor, it is important to keep in mind that teaching and research are separate skills. When choosing a professor for a course, it may be helpful to consider both their research experience and their teaching effectiveness, as well as your own learning goals and preferences.
在这个任务的完成上，两者的差异非常明显。 虽然这个原始段落是Bard 写的，但是Bard 的回答里丝毫没有举例子的痕迹了，而ChatGPT 每段都有针对性的有细节的例子。
总结
单纯从上面的使用比较来看，ChatGPT 生成的文字会更为符合要求些，写作质量也更好些。Bard 从今天下午的使用体验来看，在同一网路的情况下，使用稳定度比ChatGPT 好，当然这也可能是用户基数还没那么大的原因。
另外值得一提的是，目前这一代的Chatbot 都还在学习进步的过程中，ChatGPT 面世的比Bard 久了，相对解决的客户问题也多些，只是市场不会考虑这么多，Bard 如果不能加速赶上的话，选择ChatGPT 的就会持续的比较多。
对于我们学习语言来说，用一个下午的体验就说ChatGPT 是更好的，显然有失公允。 Bard 生成的文字易读性也是很好的。 后续用更久一段时间了，再和大家分享。
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