Biconcavity
n. biconcave的变形
🗣️ 情景例句
Do we have a bottle opener on the list, Marilyn?
清单上有开瓶器吗， Marilyn？
I was born in Spain,but I'm a citizen of France.
我在西班牙出生，但是我是一个法国公民。
They were glad of the examination being over.
他们为考试结束了而高兴。