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
She sells sea shells on the shining seashore.
她在亮晶晶的海滩上卖贝壳。
The face is the index of the mind (or heart).
相为心证。
stranger still, by moving her elbow over a child's game of Lotto she was able to describe the figures and colours printed on it;
更为奇怪的是，她把肘部在儿童玩的“罗托”纸牌上移动一下，便能说出印在纸牌上的数字和颜色。