We are constantly surrounded by noise, most of which is not audible to us unless we hold something like a seashell close to one of our ears.
我们经常被噪音包围，大多数噪音是听不见的，除非我们把海贝之类的东西靠近一只耳朵。
The electricity companies spend a lot of money each year, cutting the harm of transformers, trying to quiet the noise and maintaining equipment that is constantly affected by vibration.
电力公司每年花费大量资金，减少变压器的危害，试图降低噪音，维护经常受到振动影响的设备。
If you live in a big city, you are constantly bombarded with noise.
如果你住在一个大城市，你就会经常受到噪音的轰击。
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