Optical path difference
[化] 光程差
🧩 词语组成解析
path
[pæθ]
n. 小路，路;路线，路程;〈比喻〉（人生的）道路;（思想，行为，生活的）途径;
🗣️ 情景例句
It was very thoughtful of you to send flowers.
你送花来，想得真周到。
I was in the hospital for several weeks.
我在医院里住了几个星期了。
Which language is spoken by the largest number of people in the world?
世界上哪种语言说的人最多？