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1.The leaf-eating insects are amajor source of food for many birds andanimals.
吃叶子的昆虫是许多鸟类和动物的主要食物来源。
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2. Insects that feed onleaves are often more susceptible todiseases than those that feed on otherparts of the plant.
吃叶子的昆虫往往比那些吃植物其他部分的昆虫更容易受到疾病的影响。
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3. Researchers have found that certainleaf-eating insects playimportant roles in controlling pest populations.
研究人员发现，某些吃叶子的昆虫在控制害虫种群方面起着重要作用。