??? 情景例句
But I flunked all these classes.
但是所有的這些課都不及極。
Man is mortal.
人生誰無死。
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。