Interopercle
鳃盖间骨
🗣️ 情景例句
It's about the size of the United States, but it has a population of only 16.5 million.
它和美国一般大，但人口却只有一千六百五十万。
To scratch for fleas
因为跳蚤而抓痒
They're people I met during the trip.
他们是我旅行时认识的人。