文章出处：New York Times, Wall Street Journal, Economist, The Atlantic 等核心刊物。
知识点出处：On Writing Well，The Elements of Style 等英文写作经典和近期出版的书籍
例子
关于The Elements of Style：
"Buy it, study it, enjoy it. It's as timeless as a book can be in our age of volubility."
— The New York Times
"No book in shorter space, with fewer words, will help any writer more than this persistent little volume."
— The Boston Globe"White is one of the best stylists and most lucid minds in this country. What he says and his way of saying it are equally rewarding."
— The Wall Street Journal"The book remains a nonpareil: direct, correct, and delightful."
— The New Yorker
这本书涵盖了哪些内容：
主要是两方面：
ELEMENTARY RULES OF USAGE
从句、分词、标点等的使用
ELEMENTARY PRINCIPLES OF COMPOSITION
如何写表达清楚的段落？如何写简洁大方的句子？
片段展示 (内容摘自于书中)
9. As a rule, begin each paragraph with a topic sentence, end it in conformity with the beginning. 如何写主题句
Again, the object is to aid the reader. (文章的最高宗旨是reader friendly) The practice here recommended enables him to discover the purpose of each paragraph as he begins to read it, and to retain this purpose in mind as he ends it. (段落从第一句到最后一句，都围绕同一个主题来展开) For this reason, the most generally useful kind of paragraph, particularly in exposition and argument, is that in which
(a) the topic sentence comes at or near the beginning; Topic Sentence 建议放在第一句
(b) the succeeding sentences explain or establish or develop the statement made in the topic sentence; 第一句开始解释或者展开第一句
and (c) the final sentence either emphasizes the thought of the topic sentence or states some important consequence. 最后一句重申第一句
Ending with a digression, or with an unimportant detail, is particularly to be avoided.(最后一句不要写新的、无关信息)
According to the writer's purpose, he may, as indicated above, relate the body of the paragraph to the topic sentence in one or more of several different ways. （从第二句话开始的展开方式有很多种） He may make the meaning of the topic sentence clearer by restating it in other forms (可以做类比), by defining its terms (可以定义), by denying the contrary (可以做对比), by giving illustrations or specific instances (可以举例子); he may establish it by proofs (可以说理); or he may develop it by showing its implications and consequences (可以“因果”展开). In a long paragraph, he may carry out several of these processes.(在一个长段落里，以上方法可以综合使用)
例子：
1 It was chiefly in the eighteenth century that a very different conception of history grew up. 2 Historians then came to believe that their task was not so much to paint a picture as to solve a problem; to explain or illustrate the successive phases of national growth, prosperity, and adversity. 3 The history of morals, of industry, of intellect, and of art; the changes that take place in manners or beliefs; the dominant ideas that prevailed in successive periods; the rise, fall, and modification of political constitutions; in a word, all the conditions of national well-being became the subject of their works. 4 They sought rather to write a history of peoples than a history of kings. 5 They looked especially in history for the chain of causes and effects. 6 They undertook to study in the past the physiology of nations, and hoped by applying the experimental method on a large scale to deduce some lessons of real value about the conditions on which the welfare of society mainly depend.
1 Topic sentence. 主题句
2 The meaning of the topic sentence made clearer; the new conception of history defined.
具体展开第一句里的different conception of history
3 The definition expanded. 对于第二句里的solve a problem 进行展开，例句了各种problems
4 The definition explained by contrast. 用对比的方式展开：历史觉得开始研究peoples，而不是kings
5 The definition supplemented: another element in the new conception of history. 前一个history 的conception 是用history 解决问题；这一句话说的是在里面寻找因果报应
6 Conclusion: an important consequence of the new conception of history. 最后一句强调第一句里面提到的different conception of history 可能产生的实际意义
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