The number of cars in Beijing, for example, is growing 15% a year, contribution to the yellow-gray haze that often envelops the city.

比如北京的汽车数量正在以15%的速度递增，而这正是造成时常笼罩在北京上空的灰黄色烟雾的原因之一。

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By adding black and some white one gets the endless varieties of grays - red gray, yellow-gray, blue-gray, green-gray, orange-gray, violet-gray.

加入黑色和些许白色，你就能得到变化无穷的灰色——灰红、灰黄、灰蓝、灰绿、灰橙、灰紫。

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Wrinkles appear around the lips prematurely, too, and, in time the skin of a heavy smoker tends to be yellow-gray rather than a rosy, healthy color.

皱纹也会过早地出现在嘴唇四周，并且随着时间的推移，过度吸烟者的皮肤会变成灰黄色而不是健康的玫瑰色。

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Rhythmic starbursts of green, white and yellow brushstrokes race across the horizontal canvas, punctuated by the silver-gray verticals of evenly spaced tree trunks.

WSJ: Vincent Van Gogh Up Close | Philadelphia Museum of Art | A Matter of Perspective | By Jonathan Lopez

The hair may be yellow, auburn, ginger or red, the eyes can be blue-gray or tan, and the skin is white at birth.

CNN: Albinism

She was wearing a drab ensemble of gray cotton sweatpants and a loose-fitting pale-yellow knit top, and her brown hair fell in bangs just above her eyes.

NEWYORKER: The Hardest Vote