18. Avoid a succession of loose sentences.
1. This rule refers especially to loose sentences of a particular type: those consisting of two clauses, the second introduced by a conjunction or relative. （特指那些通过连词或关系代词联系起来的两个句子）
2. An unskilled writer will sometimes construct a whole paragraph of sentences of this kind, using as connectives and, but, and, less frequently, who, which, when, where, and while, these last in nonrestrictive senses. （那些通过and, but, who, which, when, where, and while连接起来的非限定性句子）
e.g. The third concert of the subscription series was given last evening, and a large audience was in attendance. Mr. Edward Appleton was the soloist, and the Boston Symphony Orchestra furnished the instrumental music. The former showed himself to be an artist of the first rank, while the latter proved itself fully deserving of its high reputation. The interest aroused by the series has been very gratifying to the Committee, and it is planned to give a similar series annually hereafter. The fourth concert will be given on Tuesday, May 10, when an equally attractive program will be presented.
这段话读起来的第一感受是单调，作者用多个and，while, when连接了5组关系并不是很紧密的句子，读起来没有味道，像是白开水。问题在于没有清晰的呈现句与句之间的逻辑关联性。再看一例：
e.g. I believe in aristocracy（贵族阶级）, though — if that is the right word, and if a democrat may use it. Not an aristocracy of power, based upon rank and influence, but an aristocracy of the sensitive, the considerate and the plucky（有勇气的）. Its members are to be found in all nations and classes, and all through the ages, and there is a secret understanding between them when they meet. They represent the true human tradition, the one permanent victory of our queer race over cruelty and chaos. Thousands of them perish in obscurity（默默无闻）, a few are great names. They are sensitive for others as well as for themselves, they are considerate without being fussy, their pluck is not swankiness（炫耀） but the power to endure（坚持的能力）, and they can take a joke.（The chapter "What I Believe" in E. M. Forster's Two Cheers for Democracy）
上面这段话作者用各种连词，句式，多样化地，清晰地展现了句与句之间内含的逻辑关联性，内容丰盈，承接紧密，所以没有单调，贫乏之感。