✅ 同义词
🗣️ 情景例句
Are you free?
您有空吗？
Just a short line to say thanks.
只言片语聊表谢意。
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。