问题描述：
翻译句子,1.Dogs have been man*s best friends for thousands of years.
2.With the help of the dogs,many people lost in the snow were able to get home.3.Dogs have also helped in the research work in many fields of science.4.They can hear and smell better than man,but they cannot see so well.
2.With the help of the dogs,many people lost in the snow were able to get home.3.Dogs have also helped in the research work in many fields of science.4.They can hear and smell better than man,but they cannot see so well.
问题解答：
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