Serration
n. 锯齿状, 锯齿边\\n[医] 锯齿形, 锯齿构造
📖 牛津释义
serration
n
1 [U] being serrated 锯齿状.
2 C] notch on a serrated edge 锯齿形边缘的凹口.
🗣️ 情景例句
Hey, what did you do on your trip?
嗨，旅游时玩的怎么样？
I usually feel timid in the presence of very bright people.
站在聪明人面前，我感到羞怯。
He wrote books about communism. He said that all communists should help each other.
他写了不少关于共产主义的著作。他说所有的共产党人都应该互相帮助。