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
I invited her to come by for dessert.
我邀请她来吃甜点。
In every rank, great or small, 'Tis industry supports us all.
不论高的低的各级人士，所持的都是勤劳。
Both poisons are unpleasant, but by far the more unpleasant is the blood poison.
这两种毒液都很可怕，但溶血性毒液尤其厉害。