W.c.
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🗣️ 情景例句
No, no, Robbie doesn't have them.
不， 不， Robbie没有拿。
Penny wise and pound foolish.
小事聪明，大事糊涂。
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。