Where possible, reduce the use of "which," "who" "that" "whom" "whether... or not" etc.
少用关系代词
学会运用关系代词是你学习英文过程中的一个重要的阶段。学会少用它们则表明你取得了更大的进步。在校对你的作品时，仔细检查一下所有的which’s, who’s that’s和whom’s是否必要。删除不必要的关系代词会使你的文章更精彩。
Example:
Unnecessary: It is a truth that is universally acknowledged that a single man in possession of a good fortune must be in want of a wife.
(用两个 that’s，读起来很别扭)
Better: It is a truth universally acknowledged that a single man in possession of a good fortune must be in want of a wife.
-- Jane Austin
注：被动语态修饰的名词通常不须用关系代词。
