Refringence
折射; 折射系数
🗣️ 情景例句
More sports after this.
广告后还有许多运动消息。
It is desirable to apply to good schools.
申请好学校是令人向往的。
I like television very much.How much does it cost?
我非常喜欢这台电视机。请问它多少钱？