（新概念4）第35课：下面这句中的“ to travel the quarter of a million miles from the Moon to ..Because the Moon has only an eightieth of the Earth's mass,it requires 97 per cent less energy to travel the quarter of a million miles from

（新概念4）第35课：下面这句中的“ to travel the quarter of a million miles from the Moon to ..Because the Moon has only an eightieth of the Earth's mass,it requires 97 per cent less energy to travel the quarter of a million miles from
（新概念4）第35课：下面这句中的“ to travel the quarter of a million miles from the Moon to ..
Because the Moon has only an eightieth of the Earth's mass,it requires 97 per cent less energy to travel the quarter of a million miles from the Moon to Earth-orbit than the 200 mile-journey from Earth's surface into orbit!
为什么辅导书说是做目的状语?为什么我觉得是it的主语后置呢?不是的话it到底指什么?

（新概念4）第35课：下面这句中的“ to travel the quarter of a million miles from the Moon to ..Because the Moon has only an eightieth of the Earth's mass,it requires 97 per cent less energy to travel the quarter of a million miles from
什么破书,扔掉算了,根本不是状语.
你说的倒是差不多,语法的表述是：
to travel the quarter of a million miles from the Moon to Earth-orbit 是实际的主语；
it 是形式主语,指代的就是to travel the quarter of a million miles from the Moon to Earth-orbit
如果不用形式主语,句子就是：
To travel the quarter of a million miles from the Moon to Earth-orbit requires 97 per cent less energy than the 200 mile-journey from Earth's surface into orbit!
由于主语过长,句子显得头重脚轻,所以用形式主语it,用不定式作实际主语,使句子结构平衡.

不是目的状语。
你说的有道理。可以叫做后置主语，或者干脆叫同位语。to travel...就是it 的同位语。把to提到句子前面就看出来了。
To travel the quarter of a million miles from the Moon
to Earth-orbit than the 200 mile-journey from Earth's surface...

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不是目的状语。
你说的有道理。可以叫做后置主语，或者干脆叫同位语。to travel...就是it 的同位语。把to提到句子前面就看出来了。
To travel the quarter of a million miles from the Moon
to Earth-orbit than the 200 mile-journey from Earth's surface into orbit

requires 97 per cent less energy.
在这个句子中，谁能说这不是主语？ it 指的就是to...

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因为月球的重只有地球的1/8，因此，从月球到地球的25万英里所消耗的能量要比从地球表面进入地球轨道的200英里所耗能量少97%。
需要消耗97%的能量，LESS THAN是词组，比什么什么少，体现2者对比，哪2者 ： ①moon to earth-orbit
②Earth's surface into orbit.
to 后面紧跟的tr...

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因为月球的重只有地球的1/8，因此，从月球到地球的25万英里所消耗的能量要比从地球表面进入地球轨道的200英里所耗能量少97%。
需要消耗97%的能量，LESS THAN是词组，比什么什么少，体现2者对比，哪2者 ： ①moon to earth-orbit
②Earth's surface into orbit.
to 后面紧跟的travel the quarter of a million miles from 以及
the mile-journey from 是说明2者的距离。
即：月球到地球的25万英里 和 地球表面进入地球轨道的200英里 。
it requires 97 per cent less energy 少消耗97%能量，哪里少消耗呢？TO后面开始对比出来。

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