Serrations
(serration 的复数) n. 锯齿状, 锯齿边\\n[医] 锯齿形, 锯齿构造
🗣️ 情景例句
He couldn't teach such dull children.
他教不了这么笨的孩子。
What does your father do?
你父亲做什么工作？
At the end of the first lap, Li Lei quickly passed the stick on to Jim.
在第一圈结束时，李磊迅速地将棒传给吉姆。