Biconcave
a. 双凹的\\n[医] 双凹[形]的
🏥 医学释义
双凹面的，双凹（形）的
🗣️ 情景例句
Although we hadn't met for 25 years, I recognized him the minute I saw him.
尽管我们有25年未见面了，我一看见他就认出来了。
My uncle was a pilot with the airlines.He just retired.
我的叔叔是航空公司的一名飞行员，他刚退休了。
What you have just said does hurt him.
你刚才说的话真伤他的心了。