In autumn, quite a few leaves turn yellow and fall off the trees.
在秋天，很多树叶变黄并从树上落下。
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The leaves turn yellow and brown in autumn.
秋天树叶变成黄色的和棕色的。
Why do leaves turn yellow, red, and brown in autumn?
为什么树叶秋天会变成黄色、红色和褐色？
In the fall the larch's needles turn bright yellow and fall, like leaves.
CNN: When autumn leaves fall
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