Merchant navy
n. <英>（一个国家的）商船, 商船队
🧩 词语组成解析
🗣️ 情景例句
Thanks!
谢谢。
I really should be on my way.
我真的该告辞了。
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。