Mold is usually green, white, black or gray.

霉菌通常为绿色、白色、黑色或灰色。

youdao

Some were gray, others white, and still others a mixture of brown and black.

有些是灰色的，有些是白色的，还有一些是棕色和黑色的混合色。

youdao

Just as tragic news reports and photos appeared in newsprint, the mural is limited to monochromatic tones of black, white, and gray.

就像悲剧新闻和照片出现在报端一样，壁画只使用了黑、白、灰三种单色色调。

youdao

We also got to take a peek at some hot-off-the-press Pebbles in their final finishes -- the black, gray, orange, red and white wearables posed for a point-and-shoot, so they don't pack the typical punch of a pro photo job.

ENGADGET: Pebble smartwatch hit with further delays, won't be stuffing a stocking near you

They feel more like the Cold War, a place of black-and-white and not much gray.

FORBES: Nick Saban Is The Best College Football Coach Of All Time, Something We Should Appreciate

We as customers don't see that many color options from HTC, anyway -- it's mainly black, gray and white these days.

ENGADGET: HTC talks smartphone design: from inception to final product