Concavities
n. 凹面, 成凹形( concavity的名词复数 )
🗣️ 情景例句
Michelle, can we have a talk?
Michelle，我们能谈一谈吗？
Boy Scouts serve the community.
童子军服务社区。
Look, the falling leaves are all yellow. Lots of fallen leaves make the road yellow.
看那飘零的落叶，都是黄色的，黄色的落叶铺满的路面。