The ground color is jet black.

基本色为深黑色。

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The ground color is pure white.

底色是纯粹的白色。

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The ubiquitous colors have become the ground color of China.

无处不在的红白蓝已经成为中国的底色。

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The leaves on many of the trees have already begun to change color as they prepare to drop to the ground.

VOA: special.2009.09.21

But,anyway,these police were wrestling to the ground these mayors who were protesting,using their tri-color sashes, threatening to strangle them with their own sashes of their authority.

回到正题,这些警察和抗议的市长们,在地上扭成一团,市长们用代表职权的三色旗饰带,威胁着要把警察扼死

耶鲁公开课 - 1871年后的法国课程节选

The most basic one, HueQuantize, exaggerates both red and green and moves them further to the extremes of the color spectrum, away from the indistinguishable middle ground where colorblind users get stuck.

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This 1, 000-kilogram spacecraft will be similar to the two French Pleiades satellites now in orbit, with a 70-centimeter ground resolution in black and white and 2.8 meters in color.

MSN: Chinese rocket lofts Turkish Earth observation satellite

The 4, 310-pound spacecraft will make 12 to 13 orbits per day, collecting daily up to 350, 000 square kilometers (the size of Texas) worth of color imagery at a 16-inch or 0.41-meters ground resolution.

FORBES: In The Beltway Orbit: GeoEye