Fermat principle
[化] 费马原理
🧩 词语组成解析
[计] 费马, 费尔马
🗣️ 情景例句
Maybe she'll call back. She promised.
也许她会打电话回来。她说了。
The flight is delayed.
飞机晚点起飞。
Class 3 and Class 1 were in front!
他们两人同时传出接力棒。这时3班和1班在前边！