Itisfairlyclearthatthesleepingperiodmusthavesomefunction,andbecausethereissomuchofitthefunctionwouldseemtobeimportant.muchofit,这个it指代什么?书上翻译的是指代时间的意思?我怎么就看不出来?请详解

Question

It is fairly clear that the sleeping period must have some function,and because
there is so much of it the function would seem to be important.much of it ,这个it指代什么?书上翻译的是指代时间的意思?我怎么就看不出来?请详解

Answer 1

前面又出现过sleeping period（睡眠时间）有some function,
而后面much of it 紧接在后的也是function,
前后的function是一样的,
那么这里的it 也就是指的前面的sleeping period,
因为这整句话就只有睡眠时间后面有function,
it自然就是指的时间啦~