大城市的居民饱受噪音的困扰。每天汽车，机器，电视和扩音喇叭等的声音冲击着他们的耳朵。

Sentence No. 1 Australia has millions of sheep. They say there are three sheep for each inhabitant of the country. Thousands of tons of wool are produced each year in Australia.

Sentence No. 2 People in large cities are surrounded by noise pollution. Every day their ears are bombarded by sounds made by vehicles, machines, television, loud speakers and so on.