Concavities
n. 凹面, 成凹形( concavity的名词复数 )
🗣️ 情景例句
My academic preparation, job skill, and enthusiasm about working for the firm.
我有专业知识，工作技巧，和为这家公司工作的热情。
What brings you to Beijing?
什么风把你吹到北京来的？
We are trying to collect money for a wildlife project.
我们正在设法募集资金搞一个野生动物项目。