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1.Dogs are great companions and provide a healthy excuse to go for a walk and get a bit of exercise.
companion 伙伴；同伴
Fred had been her constant companion for the last six years of her life.
弗雷德是她生命最后六年里经常跟她在一起的伴侣。
2.Researchers calculated that there were over 32,000 cases of people in the USA aged 65 and over suffering fractures attributed to walking their dog.
attribute to 把...归因于...
Extrapolating from his American findings, he reckons about 80% of these deaths might be attributed to smoking
根据他在美国的调查结果推断，他估计这些人中约有80%可能死于吸烟。
