Borofil
硼纤维
🗣️ 情景例句
and work begins at eight in the morning for me.
早晨八点我就得开始工作。
How have you been these years?
这些年你怎么样？
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%。