Biconcave lens
[医] 双凹透镜
🏥 医学释义
双凸透镜
🧩 词语组成解析
a. 双凹的\\n[医] 双凹[形]的
lens
[lɛnz]
n. 透镜，镜头;眼睛中的水晶体;隐形眼镜;汽车的灯玻璃;
🗣️ 情景例句
The bridge is about three hundred and eighty-five feet long.
桥长约三百八十五英尺。
He is never alone that is in the company of noble thoughts.
思想崇高者，绝不会孤独。
But they still put their stockings at the end of their beds.
但他们仍然把自己的长统袜挂在床脚边。