At least that's the scheme some plants have developed to defend themselves from leaf eaters.

至少一些植物就采用了这个计划来保护自身免于食草动物的伤害。

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Every plant, Ames said, is full of 100 or more chemicals, including "natural pesticides," which the plants make to defend themselves against predators.

Ames说，每一种植物，都富含100种以上的化学物质，包括“天然农药”，这是植物为了保护自己免于被取食者侵害而产生的。

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But plants can defend themselves by using both physical and chemical means.

但植物也能用物理和化学方法来保护自己。

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