一辆装有扩音系统的汽车开了过来，你一开始听到的是什么声音？

An automobile approaching with a souped-up audio system in it, and what sound do you hear at the very first?

youdao

有一天，安迪在扩音系统里播放了莫扎特的《费加罗的婚礼》。

One day Andy plays Mozart's the Marriage of Figaro over the public-address system.

youdao

如果船在下沉，你将听到船长口头发出的“弃船”令——如果扩音系统还能用的话。

If your boat is going under, you will hear a verbal "abandon ship" command from the captain, assuming the public-address system still works.

youdao

Not just an amplification system that you put in your ear, but actually an implant that replaces the function of an organ inside your ear.

人工耳蜗不是一个简单的,植入耳朵的扩音系统,而是一种,能替代听力器官功能的移植物

耶鲁公开课 - 生物医学工程探索课程节选