Concavities
n. 凹面, 成凹形( concavity的名词复数 )
🗣️ 情景例句
She was a beauty in her day.
她年轻的时候是个美人儿。
Nice guy!
好家伙！
in order that an individual or a group of individuals may earn as much money as possible.
为的是让某个个人或某一部分人尽可能多地赚钱。