纵观历史，没有我们的帮助，动物王国也生活得很好。
The animal kingdom has done just fine without our help throughout history.
动物的买卖主要是基于它们的遗传基因和繁衍历史。
Animals are bought and sold on the basis of their genetics and breeding history.
直到今天，摩尔曼斯克这个城市还没有忘记动物们的历史功绩。
Today, the city of Murmansk hasn't forgotten its part in that history.
必须记住，人类历史上很多严重的传染病均起源于动物。
Many serious infections in human history have originated in animals.
动物是自然资源，人们通过我们的历史都浪费了。
Animals are natural resources that people have wasted all through our history.
人类与动物之间的历史源远流长。
首先，要努力找到这只动物的任何历史。
总有一天会有人去研究动物对历史的影响。
Somebody someday will make a study of the influence of animals on history.
脊椎动物的出现是动物进化历史上一次质的 飞跃。
The origin of the vertebrates is one of the most important transitions in animal evolution.
脊椎动物的出现是动物进化历史上一次质的 飞跃。
The origin of the vertebrates is one of the most important transitions in animal evolution.
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