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.
尽管有些研究已经在统计每年被捕食的动物的数量，但是具体的结果仍在估计当中。
Although studies have been conducted in some areas to determine the actual number of prey killed each year, the results are estimates.
长颈鹿是被捕食的动物，经过进化后，它们现在很少会躺下，因为躺下后要再起来可不容易。
As a prey animal, the evolution of the giraffe's habits means that they rarely lie down, as it's difficult for them to get up again.
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