Concavities
n. 凹面, 成凹形( concavity的名词复数 )
🗣️ 情景例句
Honey, we don't have to move
亲爱的， 我们将不搬家
It takes time.
这需要时间。
The deepest known cave in the world is the Gouffre Berger near Grenoble.
世界上最深的洞穴是格里诺布尔附近的高弗。伯杰洞，