Concavity
n. 中央凹陷, 凹洼, 凹曲线\\n[医] 凹, 凹面
📖 牛津释义
concavity
n
(a) [U] quality of being concave 凹状; 凹形.
(b) [C] concave surface 凹面.
🗣️ 情景例句
Is this all Grandpa's stuff?
这里面都是爷爷的东西吗?
Better be the head of a dog than the tail of a lion.
宁为犬首,不作狮尾。
We tell river all our secrets.
我们向那条河倾诉我们的秘密。
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