Concavities
n. 凹面, 成凹形( concavity的名词复数 )
🗣️ 情景例句
Would you like something to eat?
来吃点东西， 好吗？
Deliberate before you begin, then execute with vigour.
著手前要深思熟虑，执行要果断有力。
The lower gun-ports were now below water and the inrush sealed the ship's fate.
下层炮眼已淹没在水里，涌进船舱的水给瓦萨号带来了难以逃脱的厄运。