Ballvalve
球型人造瓣膜
🗣️ 情景例句
I will have a cheeseburger, medium rare,
我要一份起士汉堡，五分熟，
I'm sick and tired of my monotonous life.
我对自己的单调生活感到厌倦。
Good, we'll pack up the order as soon as we get the not.
好，我们一收到会立刻打包。