Refringency
折射系数
🗣️ 情景例句
What time do you usually get up in the morning?
你早上通常几点起床？
What a sauce for the goose is sauce for the gander.
不分畛域，一样对待。
Tomorrow I want you to give us a talk, Jim.
吉姆，明天我想请你给我们作一次讲话。