这是一个自然过程，任何一种过于特化而不能随环境改变而改变的动物，或者任何一种与适应性更强、更厉害的动物来竞争的动物，灭绝都是其必然的命运。
It is a natural process and extinction is the fate of any animal that has specialized too far to change when its environment changes, or has to compete with a better-adapted and more powerful animal.
这是一个自然过程，任何一种过于特化而不能随环境改变而改变的动物，或者任何一种与适应性更强、更厉害的动物来竞争的动物，灭绝都是其必然的命运。
It is a natural process and extinction is the fate of any animal that has specialized too far to change when its environment changes, or has to compete with a better-adapted and more powerful animal.
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