为生存而进行的斗争不是发生在战斗中,而是在争夺有限的觅食区和占用没有肉食动物的区域的竞争中。
The struggle for existence occurs not in fights, but in the competition for limited feeding areas and for the occupancy of areas free from meat-eating animals.
然而,如果能给被捕食的动物提供一些它们在野外时那样的安全区域,它们的数量会降到很低但不灭绝。
However, if safe areas like those prey animals have in the wild are provided, the prey population drops to low level but not extinction.
在喷水孔周围的这片区域也是特别敏感的,被捕获的动物往往强烈反对被触摸那里。
The area around the blowhole is also particularly sensitive and captive animals often object strongly to being touched there.
That's one way of thinking why animal cells have cells from animals and humans have sub-cellular compartments.
这就不难想见,为什么动物细胞,包括,人类细胞有亚细胞结构区域了
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