Sinus sigmoideus
<拉>乙状窦
🧩 词语组成解析
n. 窦, 静脉窦, 凹陷处
🗣️ 情景例句
You get an a for effort.
你尽了最大的努力。
A barking dog is better than a sleeping lion.
吠犬胜于睡狮。
when the plane suddenly turned round and flew back to the airport.
这时飞机突然调转头来，飞回了机场。