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
Harry's a professional camper, Mom.
Harry是露营专家，妈妈。
Are you in the mood to listen to music?
你有兴致听音乐吗？
Mine are red, and they're much bigger!
我的是红的，并且比你的大得多！