Plano-concave
a. (透镜)平凹的
🧩 词语组成解析
a. （透镜）平的
concave
['kɔn'keiv]
n. 凹面，成凹形;
adj. 凹的;
vt. 使成凹形;
🗣️ 情景例句
She loves children.
她喜欢孩子。
I assure you of its quality.
我向你保证它的品质。
In the struggle, the strap broke and, with the bag in their possession, both men started running through the trees.
在争抢中，手提包的带断了，包落入这两个人手里，他们拔腿跑进了树林。