请将下问翻译成中文
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Joseph Emmons can't use his eyes .He's blind. He has a trained dog named Buster that lead him where he wants to go. Buster is called a seeing-eye dog.
Although Mr Emmons has a handicap, it'isn't a big problem.He has a useful job and he earns his own money.Mr Emmons sells brooms and mops to people in this part of the city. He has worked every day except Sunday for forty years.
After his early breakfast, Mr Emmons holds Buster,carries brooms and mops and walks from house to house. People choose a broom and they pay him while Buster sits and waits beside his master. It takes four and one-half months to walk to every house in this part of the city. So Mr Emmons visits each house every four months, and by then the people are usually ready to buy new btooms.
But these days he has a problem. His brooms last so long that sometimes they are still good after four months. Then nobody needs to buy a new one. Mr Emmons likes his job and is proud of his brooms. He picks up a new supply of brooms every week.He says,"If you don't sell people something good, they're not going to buy from you the second time you come around."
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谢谢拉`最好是一句一句地翻译```
PS.最好能把此文章的所有短语也告诉我```谢谢哈