Refringency
折射系数
🗣️ 情景例句
He's a pretty good bloke and he seems very friendly.
他是一个很不错的家伙，看起来也很友善。
I'm Donald. We met the last time you visited Taiwan.
我是唐纳德，上次你来台湾时我们见过面。
Yes. Let me introduce him to you.
是的，让我把他给你们介绍一下。