Concavities
n. 凹面, 成凹形( concavity的名词复数 )
🗣️ 情景例句
It is great.
的确是太好了。
I wasn't serious, I meant it as a joke.
我并非有意，我只是开个玩笑而已。
What about vegetables, Sir? They usually go bad as soon as we are at sea.
那些蔬菜怎么办呢，先生？通常是刚一出海它们就会坏掉的。