Why do newspapers turn yellow over time?
随着时间的流逝，报纸为什么会变黄呢？
They turn yellow along the way and are ready to be sold.
它们在路上变黄，准备好被出售了。
Some leaves started to turn yellow and the weather became cool.
树叶开始变黄了，天气也转凉了。
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。
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。
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。
The colours are magnificent, but the question of exactly why some trees turn yellow or orange, and others red or purple, is something which has long puzzled scientists.
这些颜色很瑰丽，但究竟为什么有些树会变成黄色或橙色，而有些树会变成红色或紫色，这个问题一直困扰着科学家。
树叶到秋天就变黄了。
Leaves of the tree turn yellow.
树上的叶子变黄了。
秋天树叶变黄了。
叶片开始变黄。
Leaves will turn yellow in autumn.
秋天时树叶将会变黄。
In autumn, the leaves turn yellow.
秋天，树叶变黄。
When autumn comes leaves turn yellow.
当秋天来到的时候叶子都变黄了。
The leaves will turn yellow in autumn.
在秋天，叶子会变黄。
When autumn comes, leaves turn yellow.
当秋天来到的时候，叶子都变黄了。
The leaves turn yellow and brown in autumn.
秋天树叶变成黄色的和棕色的。
In autumn the leaves on the trees all turn yellow.
秋天树上的叶子都变黄了。
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？
Teresa told her son that leaves turn yellow in autumn.
特丽萨告诉儿子秋天树叶变黄。
As autumn is approaching, leaves begin to turn yellow.
秋天到了，树叶变黄了。
Autumn comes. It gets cold and the leaves turn yellow.
秋天来了，天变冷了，树叶变黄了。
Shirt collars will easily turn yellow from sweat in summer.
夏天穿衬衫，领口很容易被汗浸得发黄。
In the autumn, the leaves on the trees turn yellow and red.
在秋季，树上的叶子变黄，变红了。
In the autumn, the leaves on the trees turn yellow and red.
在秋天，树上的叶子变黄，变红了。
I am almost all white, although my fur may turn yellow in summer.
我几乎纯白色，但在夏天，我的皮毛可能会变黄。
I am almost all white, although my fur may turn yellow in summer.
我几乎纯白色，但在夏天，我的皮毛可能会变黄。
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