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
Let's talk.
我们谈谈吧。
That sounds OK. I'll need it from the 10th to the 14th.
听上去挺不错。从10号到14号我需要租一辆。
He talks as if he were the head of the office.
他说话的口气像办公室主任似的。