Classificational
分类的
🗣️ 情景例句
since this is so easy ....
既然那么简单……
He phoned to cancel the meeting.
他打电话来取消会议。
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。