Semitight
半密封的
🗣️ 情景例句
We'll tell you the big surprise.
我来告诉你们这个大惊喜。
To carry gasoline
运送汽油
The further off this solid obstruction, the longer time will elapse for the return of the echo.
固体障碍物越远。回声返回所用时间就越长。