Phonocardiogram
n. [医]心音图
🗣️ 情景例句
I think it's time for the wedding to begin.
我想是婚礼可以开始的时候了。
What time?
什么时候？
How did the bees know exactly in which diection to fly?
蜜蜂是怎样确切地知道朝哪个方向飞呢？