Optical speed
[计] 光速
🧩 词语组成解析
speed
[spid]
n. 速度;快速;昌盛;（汽车的）变速器，排挡;
vt.& vi. 急行，加速;
vi. 超速;加速;迅速前行;兴隆;
vt. 加快…的速度;使成功，使繁荣;
🗣️ 情景例句
Easy now. Easy does it. That's it.
放轻 ，不要紧 ，对了。
I have a feeling he will get to the airpot on time.
我有一种感觉他会准时到机场。
Learn to say the right thing at the right time.
学会在适当的时候说适当的话。