Extremals
极值曲线
🗣️ 情景例句
If you can't get a cab, give me a call. It's not safe to walk home along at night.
如果你叫不到出租车的话，打电话给我，晚上一人走回家不安全。
Starved to death
饿死了
Have you brought anything to weigh the flesh?
你带来了称肉的器具吗？