1. Ants may carry aphids and other insects up a tree and place them on the leaves. (蚂蚁可能会把蚜虫和其他昆虫带到树上,将它们放在叶子上。)
2. Ladybugs are natural predators of aphids and can help control their population. (瓢虫是蚜虫的天敌,可以帮助控制它们的数量。)
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