Optical indices
[医] 光学指数
🧩 词语组成解析
pl. 索引, 指针, 指数, 指标
🗣️ 情景例句
It's certainly a pleasure to meet you.
认识你真是我的荣幸。
To answer the first part of your question, I'd like to say that our studies were very extensive.
你问题的第一部分，我要说的就是我们的研究非常广泛。
Hardly anyone can positively enjoy sitting in a train for more than a few hours.
很少有人能够真正喜欢坐几个小时以上的火车。