Rhythmophone
[医] 心搏扩音器, 心律扩音器
🗣️ 情景例句
If you're under twenty-one years of age ...
如果你还不到二十一岁……
In prosperity caution, in adversity patience.
处顺境时要小心，处逆境时要耐心。
May I know the quantity you require?
请问你们需要多少数量的货物？