Birefracting
[机] 双重折射的
🗣️ 情景例句
Fortunately, they returned safely.
说来幸运，他们平安回家了。
Pat began to feel unhappy about what he had done.
帕特开始对自己所做的事感到悲伤。
Were there any exciting incidents during your journey?
你们在旅行中有没有什么令人激动的事情？