332. John cannot afford to go to university, not to speak of going abroad.

英语四级译文:
约翰连大学都上不起，更别提出国留学了。

四级词汇讲解:
not to speak of为“不用说”，相当于not to mention。但是二者并不完全一样:not to mention后面可以接句子，而not to speak of后面只能接名词或名词性短语。如:

※ We're too busy to take a long holiday this year, not to mention the fact that we can't afford it.我们今年太忙，不能去度长假，更何况我们也出不起这笔钱。

※ The boy hasn't learned arithmetic, not to speak of algebra.这孩子算术还没学会，更别说代数了。

英语四级考点归纳:
与not to speak of和not to mention含义相近的短语还有much less，但是much less只能修饰带否定含义的句子，而not to mention则没有这个限制。如:

※ At the age of fourteen I had never even been on a train，much less an aircraft.14岁的时候，我还没有坐过火车，更别提坐飞机了。

※ He's one of the kindest and most intelligent, not to mention handsome，men I know.他是我认识的人当中最善良、最聪明的，不用说，他也是最帅的。