树木在他们头顶上空形成了一个枝叶茂盛的遮篷。

The trees formed a leafy canopy above their heads.

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当树木长大枝叶茂盛时，它们可以起到隔声的作用。

Trees also serve as sound barriers when full grown and leafed out.

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当树木长大枝叶茂盛时，它们可以起到隔声的作用。

Trees also serve as sound barriers when full grown and leafed out.

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