Pararipples
[地质]超波痕
🗣️ 情景例句
Thank you for taking care of me here.
多谢您的周到招待。
I hope you change his decision.
我希望你改变他的决定。
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。