Refringence
折射; 折射系数
🗣️ 情景例句
I would like to send this by registered mail, please.
我想把这封信挂号寄出。
I will be thy friend,but not thy vices' friend.
我愿意做你的朋友，但不做你那些恶习的朋友。
Look at the rain! It's heavy, isn't it?
瞧这雨！下这么大，是吧？