sleep less than is good for them这句话怎么翻译比较好1998年1月四级里的

Americans sleep less than is good for them.求翻译 Americans sleep less than is good for them这句话怎么分析 He sleep less than is good for them.书上说than引导定语从句,但less不是名词类的吧,less不是不定代词吧，感觉是修饰sleep，更像副词。 sleep less than is good for them这句话怎么翻译比较好1998年1月四级里的 sb is less than fortunate sandy sleep less than 9 hours every day 对 less than 提问( )( )( )( )sandy( )every day I never sleep for less than nine hours.中文是什么? People who sleep ___ six hours a day.是填fewer than还是less than Yuor diet is less healthy than mine.为什么用less? She no less than you is wrong.no less Today is less warmer than yesterday.改错 is less than useless这么说对吗? He is no less diligent than Peace is ( )the absence of war.A) less than (B) no less than (C) more than (D) not less than is less than is lesser than那个对?is less than is lesser thanis less of is lesser ofis smaller than那个对?（做小于讲） We shouldn't sleep[ ] than eight hours a night.是 less 还是 fewer为什么? for后跟一段时间的时候可否省略?可以说 They sleep less than nine hours吗 Obama is less beautiful than inteligent.这句话该怎么翻译 less...than做何解.