Sinus sigmoideus
<拉>乙状窦
🧩 词语组成解析
n. 窦, 静脉窦, 凹陷处
🗣️ 情景例句
watch the last three minutes of the game.
看完那最后三分钟的球赛。
We used to have a lot of fun when we were that age.
当我们是变老时，我们过去常有很多趣事。
This was known as panning for gold.
这就是人们所熟知的“淘金”。