海豚是人类的朋友。
狗是人类的朋友，不仅因为他们可爱，而且因为他们忠实于主人。
Dogs are friends of man not only because they are lovely but also because they are faithful to their master.
我们知道狗狗是人类的朋友。
所以最好还是多交些人类的朋友吧。
动物长期以来一直是人类的朋友。
Animals have been the friends of mankind since a long time ago.
他们很久以前就是人类的朋友了。
众所周知，书籍是人类的朋友。
很久以前动物就是人类的朋友。
鸟是害虫的天敌鸟是人类的朋友。
Birds are natural enemies of insect pests of human bird friend.
是昆虫的天敌，人类的朋友。
这种电脑可以当作人类的朋友来对待。
野生动物是，人类的朋友！
野生动物是人类的朋友！
野生动物是人类的朋友！
动物是我们人类的朋友，应该受到平等对待。
Animals are friends to us human beings and should be treated equally.
动物是人类的朋友，也是我们环境的一部分。
人们反对食用狗肉，因为狗是我们人类的朋友。
People are against eating dog meat, because dogs are our human friends.
树木是人类的朋友，他们对我们是非常有用的。
Trees are human's friends and they are extremely helpful to us.
鸟是人类的朋友，自古以来就深受人们的喜爱。
马是人类的朋友。
动物是人类的朋友，请爱护它吧！爱护动物人人有责。
Animals are friends of human beings, please take care of them! Love is the animal.
人类的朋友普罗米修斯教他们建造比洞穴舒适的简易房屋。
Their friend, Prometheus taught them to build simple houses, which were much more comfortable than the caves had been.
这一天我收获最大的是真正地意识到动物是人类的朋友。
What I got the most that day was that I really realized animals are the friends of our human beings.
鸟类是人类的朋友，与鸟类和平共处是人类文明的象征。
Birds are people's friends, and peaceful coexistence with birds symbolizes the human civilization.
动物是人类的朋友，保护动物，也是保护人类共同的家园。
Animals are friends of human beings, animal protection, but also to protect the common home of mankind.
狗是人类的朋友，不仅因为它们可爱，而且因为它们对主人忠诚。
Dogs are friends of man not only because they are lovely but also because they are faithful to their masters.
朋友们，动物是大自然留给人类的无价之宝，它是我们人类的朋友。
Friends, animal is left to the human nature, it is the priceless treasure we friends of human beings.
朋友们，动物是大自然留给人类的无价之宝，它是我们人类的朋友。
Friends, animal is left to the human nature, it is the priceless treasure we friends of human beings.
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