Valvulotomy
n. [医]瓣膜切开术
🗣️ 情景例句
Just three days.
只要三天。
It's Monday today.
今天是星期一。
that is something like 6,000,000 spiders of different kinds on a football pitch.
这就是说，在一个足球场上约有600万只不同种类的蜘蛛。