Dogs are our best friends. But it’s hard to believe that they used to be wild animals.
狗是我们最好的朋友，很难相信它们曾经是野生动物。
Thousands of years ago, you couldn’t find dogs. You could find wolves. Wolves and humans lived side by side. The wolves probably ate the food people threw away around their villages. As time went by, these wolves started to be guard dogs and help to drive away dangerous animals. Since then, we have been friends with dogs.
几千年前，你找不到狗。你可以找到狼，狼和人类一起生活。狼可能吃些人们在村庄周围丢弃的食物。随着时间的推移，这些狼开始成为护卫犬，帮助赶走危险的动物。从那时起，我们就成了狗的朋友。
Dogs communicate through body language and sound. It might bark with excitement, give you a lick or wag its tail to show its happiness. Wagging its tail back and forth means a dog feels relaxed and friendly. Wagging its tail low tells you that a dog feels worried. Standing its tail straight up tells you that a dog feels nervous.
狗通过肢体语言和声音进行交流。它兴奋时可能会吠叫，舔你一下或摆动它的尾巴表示它的开心。来回摆动尾巴表示是狗感到放松和友好，低摇尾巴表示狗感到害怕，尾巴竖直表示狗感到紧张。
Dogs are lovely animals. Scientists have found that keeping a dog can make people healthier and people can have a higher level of physical activity. Dogs were wolves thousands of years ago. If you want to keep a dog as a pet, make sure your family has enough space, money and the time that you need to care for a dog. Play and exercise are important for dogs to stay happy and fit. Some dogs like to jump with their owners or go for a swim. For most dogs, the most important job of all is bringing love and joy to their families.
狗是可爱的动物。科学家发现，养狗可以让人更健康，人们可以有更高水平的体育活动。几千年前狗是狼，如果你想养狗作为宠物，请确保你的家人有足够的空间、金钱和时间来照顾狗。游戏和锻炼对狗保持快乐和健康很重要。有些狗喜欢和主人一起跳或者去游泳。对大多数狗来说，最重要的工作是给家人带来爱和欢乐。
