Concavity
n. 中央凹陷, 凹洼, 凹曲线\\n[医] 凹, 凹面
✅ 同义词
📖 牛津释义
concavity
n
(a) [U] quality of being concave 凹状; 凹形.
(b) [C] concave surface 凹面.
🏥 医学释义
凹面，凹度
🗣️ 情景例句
What are you trying to say?
你想说什么？
When an opportunity is neglected,it never comes back to you.
机不可失，时不再来；机会一过，永不再来。
The letter x stands for an unknown number.
字母x代表未知数。