Concavo-concave
a. 两凹的, 两面凹洼的\\n[建] 两面凹的
🧩 词语组成解析
concave
['kɔn'keiv]
n. 凹面，成凹形;
adj. 凹的;
vt. 使成凹形;
🗣️ 情景例句
No, no, Robbie doesn't have them.
不， 不， Robbie没有拿。
OK. You'll have to use a credit card or leave a $100 deposit.
好。你必须使用信用卡，否则要付100美元的押金。
Mother, can we cook the food now, please? she said. I'm worried about my party.
“妈妈，请问现在我可以做吃的东西了吗？”她说，“我担心我的聚会。”