However, many scientists suspect that noise is a greater danger than they believed.
2
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。
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.
3
然而，不是所有的人都知道噪音也是一种污染，它也对人类的健康有危害。
However, not all people know that noise is also a kind of pollution, and it is harmful to human's health, too.
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