The microwave beeps to let you know when it has finished.
微波炉烹饪完毕时会发出哔哔声提醒你。
《牛津词典》
2
They felt sleepy when exposed to regular beeps.
当听到有规律的蜂鸣声时，他们会感到困倦。
3
If the robot is unsure whether an animal is suitable for the microwave, it has the opportunity to stop, sent out beeps, and ask for directions from a human.