Planet x
未知行星；冥外行星
🧩 词语组成解析
🗣️ 情景例句
you gave me enough information
已经给了我充分的资料。
Please remember this is not to be taken as final.
请记得这不是最后的回答。
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%。