Cannulas
套管, 插管
🗣️ 情景例句
What did they say?
他们说什么?
A horse stumbles that has four legs.
人有失手日，马有失蹄时。
You are better now, but you mustn't get up yet. You must stay in bed for another two days.
你现在好些了，但你还不应该起床。你必须再卧床两天。