Concavities
n. 凹面, 成凹形( concavity的名词复数 )
🗣️ 情景例句
That's fine. Thank you.
很好。谢谢你。
I think your industrial robots are the best in the field.
我认为你们的工业机器人在这领域是最好的。
What's your trouble?
你哪儿不舒服？