Why do my toenails go black?

为什么我的脚趾甲会变黑？

youdao

The moon doesn't go black because indirect sunlight still reaches it after passing through the Earth's atmosphere.

月球不会完全变黑，因为部分阳光经过地球大气之后，仍能间接照射到月面。

youdao

“It’ll be so exciting to have a live broadcast when thousands of computers go black!” wrote a netizen from Guangzhou.

广州的一位网民说，“当数千台电脑变黑的时候做个现场直播是让人多么激动的事情啊。”

youdao

And Alan Lomax had somevery compelling and really engaging stories to tell about actually painting himself up in blackface so that he could go into black communities, so that some of the whites wouldn't single him out and beat him up or whatever."

VOA: special.2010.01.18

I'd like to go by climbing a birch tree, And climb black branches up a snow-white trunk toward heaven, till the tree could bear no more, But dipped its top and set me down again.

我真想去爬白桦树，沿着雪白的树干，爬上乌黑的树枝，爬向那天心，直到树身再支撑不住，树梢碰着地，把我放下来。

耶鲁公开课 - 现代诗歌课程节选

We are against any warwhere black soldiers go to fight and come to be brutalized andkilled in their own communities.

VOA: standard.other

All sites within the MLG network, including www.majorleaguegaming.com and www.gamebattles.com, will go black from 8 am to 8 pm ET on January 18th.

FORBES: Connect

If the bookies refuse, their off-course screens may go black.

ECONOMIST: Horse-racing

My approach has been to buy more of the colors that go with black and no more black.

WSJ: Tina Gaudoin on Style: Back to Black