Mitralization
二尖瓣型心
🗣️ 情景例句
It's not like I have nobody.
我身边并非没有亲近的人。
Would you please put it on top?
能请你把它放在最上面吗?
With a stopwatch, they counted how many times the bees repeated the dance during one minute.
他们用秒表记录蜜蜂在一分钟内重复舞蹈的次数。