Planoconcave
[医] 平凹的
🏥 医学释义
现凹的
🗣️ 情景例句
He's on leave now.
他现在在休假。
I'm not accustomed to going out after dark.
我不习惯在天黑了以后去外面。
Right from the start there was trouble with the Hubble.
从最开始哈勃望远镜就有问题。