Birefraction
双折射
🗣️ 情景例句
I haven't seen you since the hospital.
自从医院相遇之后再也没有见到你。
Is it serious?
我的病严重吗？
In our game we also have eleven players in a team, but our ball is like this.
比赛中，我们一个队也有11名队员，不过我们的球是像这样的！