Riga's disease
[医] 里加氏病, 恶病质性口疮
🧩 词语组成解析
🗣️ 情景例句
Well, there must be something.
嗯 ，一定可以找到事做。
Come what may, heaven won't fall.
船到桥头自会直。
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。