Refringence
折射; 折射系数
🗣️ 情景例句
There's so much for young people to see and do.
这里有很多可供年轻人看和做的事情。
No matter what she says, don't show you are afraid.
不论她说什么，你也不要让人知道你害怕了。
'He had travelled only seven miles across the Channel when his engine failed and he was forced to land on sea.
但他只在海峡上空飞行7英里，引擎就发生了故障，他只好降落在海面上。