Play allows a young animal to explore its environment and practice skill in comparative safety since the surrounding adults generally do not expect the young to deal with threats or predators.

玩耍可以让一只小动物探索环境并在相对安全的环境中练习技能，因为周围的成年动物通常不期望幼崽应对威胁或捕食者。

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For instance, islands often have not been colonized by large predators or are too small to hold feasible predator populations.

例如，岛屿通常没有大型食肉动物的殖民地，或者太小而无法容纳可行的食肉动物种群。

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The problem is that other smugglers are predators, who abandon, kidnap or kill their charges.

问题是有些人贩是掠夺者，他们抛弃、绑架或者杀害被他们绑架的人。

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No big cats or other predators in sight.

BBC: The first rule in tracking lions: No running

The Maryland researchers concluded that while many fish launch out of the water into the air to capture prey, migrate, or avoid predators, the guppies have a different evolutionary motive: to reach all the available habitat in Trinidad's mountain streams.

CNN: After a swimming start, guppies jump, researchers find

Its colloquial name stems from the odor emitted from glands on its abdomen a defense mechanism triggered by disturbances like predators or homeowners who stumble upon them in attics.

WSJ: Out of Odor: Offensive-Smelling Bugs Put U.S. Farmers on the Defensive