Lapstone
n. (木匠干活时)放在膝上的垫石(或垫铁)
🗣️ 情景例句
But?
但是？
Are you doing anything special?
你们有什么特别的安排吗？
it takes much less energy to accelerate to that 1.5 miles per second than it does on Earth.
在月球上加速到每秒1。5英里比在地球上所用能源要少得多。