I'd like you to meet Audrey and her mother, Mrs. Cooper.
我来向你介绍, Audrey和她母亲 Cooper太太。
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%。