Optical constants
[电] 光学常数
🧩 词语组成解析
n. 常量, 常数；物理常数（constant的复数）
🗣️ 情景例句
by having us all come together.
使我们聚在一起。
Did you cut yourself?
你自己剪的？
The system has worked so well, that it has been adopted in other countries too.
由于这种制度行之有效，已被其他国家采纳。