Ductus
[医] 管, 导管
🗣️ 情景例句
There's been a car accident, please call the police.
这发生了车祸，请快报警。
Teach your grandmother to suck eggs.
班门弄斧。
It was not yet light, so it was easy to stay hidden.
天还没亮，所以很容易隐蔽。