Question

新概念英语第四册24 25课其中两句比较难的句子

yet do they convey a hint of beauty and serenity greater than we have known or imagined这句话是24课的,这里是形容词比较级,为什么这里是形容词greater在名词前面呢？？？？What is needed in the case of noise is a study of large numbers of people living under noisy conditions这句话是25课的，书上翻译为。。。对于噪音问题，需要研究大量生活在噪音下的人进行研究！这里的What is needed怎么理解呢？？？？从翻译的角度似乎不是什么特殊疑问句！那么这里的what是指什么？？？

Answer 1

greater than we have known or imagined为 a hint of beauty and serenity 的后置定语，相当于定语从句which is greater than we have known or imagined
What is needed in the case of noise 为主语从句

Answer 2

在这里指代什么??? 1, which引导的是定语从句，修饰an idea, 起补充说明的作用。 2. to 是介词，译为“向”。 这是意译,不是直译. out a