同样是暖血动物而且效率更高、适应性更强的捕食者，人类，成为这些哺乳动物的日益迫近的威胁。
Trouble has closed in on these mammals in the form of equally warm-blooded and even more efficient and adaptable predators, humans.
同样是暖血动物而且效率更高、适应性更强的捕食者，人类，成为这些哺乳动物的日益迫近的威胁。
Trouble has closed in on these mammals in the form of equally warm-blooded and even more efficient and adaptable predators.
总的说来，乌贼的能量需求比暖血的鲸低300到600倍，鲸是另一种南极海域的顶级食肉动物。
Overall, the squid's energy requirements are 300 to 600 times lower than those of warm-blooded whales, the other top predators in Antarctic waters.
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