Sheathless
无鞘的
🗣️ 情景例句
What you're saying is, in order for this center to succeed,
你刚才所说的意思是为了使中心能成功，
Lend your money and lose your friend.
赔了夫人又折兵。
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%。