If you can meet our needs- to order 200 sets, we'll give you trade discount.
如果你能答应我方的要求--定200台,我们同意给你折扣。
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!
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%。