随着冬天的到来，树叶变黄，开始飘落。
With winter coming, leaves of trees turn yellow and begin to fall.
随着时间的流逝，报纸为什么会变黄呢？
在秋天，很多树叶变黄并从树上落下。
In autumn, quite a few leaves turn yellow and fall off the trees.
这种染料会使尿液变黄，一些特定的食物——比如芦笋——会使尿液发出难闻的气味。
The dye can color the wee, and certain foods – such as asparagus – can make it pong.
标准医学术语中，“黄疸”是一种皮肤变黄的症状。
Standard medical terminology uses jaundice for a symptom yellow discolouration of skin.
书也可以人工变黄(通过放在太阳下晒，放入烤箱低温非常小心地烘烤)来做成极好的仿古董墙装饰。
Book pages artificially yellowed (by leaving them in the sun, or very carefully baking them in an oven at a low temperature) make terrific faux-antique wall decoration.
漂白剂防止白衣服变黄。
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.
香烟中的尼古丁不仅会使你的牙齿以及你家的墙变黄，而且还会使你的手指和指甲变色。
The nicotine in cigarette smoke can not only make your teeth (and the walls of your home) brown, but it's also notorious for staining fingers and nails as well.
澳大利亚科学家培育出了一种切开后不会变黄的苹果。
Australian scientists have come up with an apple that does not go brown when cut.
糖霜已经不见或变黄变质了，于是我决定将它售出，但不是为了钱。
The icing had faded and yellowed and I decided to sell it, but not for the money, "she added."
人们可以看到狗的皮肤颜色稍微变黄，但对于肉眼而言，荧光在没有紫外光照射和未使用护目镜时不会被看到。
One can witness a slightly yellower change in the color of the dog's skin, but to the naked eye, fluorescence cannot be seen without the presence of UV light and goggles.
后来我带着一些科学家去了泰姬陵，让他们看看大理石为什么会消溶，颜色为什么会变黄。
I took scientists with me to the Taj Mahal, to show them how it is getting marble cancer, how it is becoming yellow.
果实成熟时，瓜的外表皮变黄，变硬，果肉成碧绿色，像果冻一样滑溜。
When ripe, the melon has a thick spiky yellow outer skin, with bright green, jelly like flesh.
多喝茶会让你的牙变黄，但是对你的身体有好处.
Too much tea will brown your teeth,but it's good for your health.
吸烟会导致口臭，牙齿变黄，影响头发的健康。
Because smoking gives you bad breath, yellow teeth and affects the health of hair.
如果香烟致癌还不足以构成拒绝抽烟的理由，那么想想抽烟会让你更难看：让你的牙齿变黄，皮肤出现皱纹，还会有口臭。
If avoiding cancer isn't a good-enough reason, smoking also makes you uglier: It yellows your teeth, wrinkles your skin and makes your breath stink.
绿叶已经变黄。
“整个世界都在变黄啦！”它们说。
“All the world is turning yellow, I suppose, ” said they, —and perhaps they were right.
树叶在变黄。
有网友上传了中国几位当红明星的照片，他们"变老"后下巴松弛，牙齿变黄，嘴部长出皱纹，眼角也出现了鱼尾纹。
Some netizens have loaded a few photos of Chinese celebrities into the site, and we see them with saggy jawlines, yellowed teeth, wrinkled lips and crow's feet.(See photo)
他一度回头望望夹在变黄树篱中间的那条无穷无尽的秋色小径。
He looked back once, up that endless vista of autumn lane between the yellowing hedges.
树叶正在变黄，这意味着秋天就要来了。
每当秋天到来时，树叶会变黄。
每当秋天到来时，树叶会变黄。
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