With winter coming, leaves of trees turn yellow and begin to fall.

随着冬天的到来，树叶变黄，开始飘落。

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With autumn coming on, the days are getting cooler and the leaves are beginning to turn yellow.

随着秋天的到来，天气变得更冷了，并且树叶开始变黄了。

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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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In the fall the larch's needles turn bright yellow and fall, like leaves.

CNN: When autumn leaves fall