China has three main types of teas: green tea, black lea and wulong tea, a halfway between black and green tea.

中国有三种主要的茶：绿茶、红茶和乌龙茶，乌龙茶是一种介于红茶和绿茶之间的茶。

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More than a few of us do not know the difference between black-tie or white-tie events.

但很多人却不知着黑领结或白领结盛会的不同之处。

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Let's consider a little more closely the distinction between black and white box perspectives.

我们进一步考虑一下黑盒和白盒透视图之间的区别。

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"And so they would travel to places where certainly white people in the thirties and forties would not work too much in black communities, because there was so much antagonism between black and white at that time racism toward African Americans.

VOA: special.2010.01.18

They fled to Senegal two decades ago to escape clashes between black African and Moorish communities in Mauritania.

VOA: standard.2009.10.24

Two black farm workers have been arrested. Police were obliged to erect razor wire between blacks and whites during a tense standoff Tuesday outside the courthouse where the two suspects were charged with murder.

VOA: standard.2010.04.08

Today the mayor declared that the established bond between black and white would hold.

CNN: Talking Race With The President

However, not all felt an African pope would lead to equality between black and white.

CNN: Unity, faith, peace. Why Africans want an African pope

Estimates such as this may help finally unravel the interplay between black holes and the galaxies that host them.

BBC: Supermassive black hole weighed using new scale