题型：翻译 题类：常考题 难易度：普通
仁爱科普版九年级上Unit 2 Saving the earth. Topic 1 Pollution has causestoo many problems.同步练习
It can even them to or deaf.
People who in noisy conditions often go deaf.
a loud noise is also a kind of pollution.
Nowadays, many countries are to solve all of environmental problems, noise pollution.
It that many teenagers in America can hear than 65-year-old people do.
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