Vacuometer
n. 真空计, 低压计
🗣️ 情景例句
Hey, do you work out?
嘿，你锻炼吗？
He guessed the train would come in early.
他猜想火车会很早到达。
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%。