Perithallium
围层
🗣️ 情景例句
You must be green to believe that!
你真幼稚，竟然相信那个。
As far as I'm concerned, you can stay out all night.
对我来说，你可以整晚都在外面。
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。