I love those depressing times in my life. Although dark, they made me cherish the sunshine more.

我爱我生命中的晦暝时刻，虽然灰暗但是可以让我更珍惜阳光。

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Icebergs are ordinarily blue to white, although they sometimes appear dark or opaque because they carry gravel and bits of rock.

冰山一般是蓝色到白色，尽管有时因为携带了砾石和小岩石而变成黑色或者不透明。

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Although it is often regarded as the dark side of the moon, the far side actually gets as much sunshine as the near side.

虽然月球背面经常被认为是月球暗面，但事实上月球背面的阳光照射同月球正面一样多。

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Although in some cases, dark thoughts can be a severe and debilitating symptom of a postpartum anxiety or depressive disorder, usually they are just an unpleasant part of normal adjustment.

CNN: When motherhood becomes a nightmare

But although Flanery, too, takes a dark view of history, and resists offering false comfort, his is a more capacious darkness.

NEWYORKER: Unreconciled

Instead, his beard appears dark, thick and trimmed, although analysts have suggested that rather than being dyed, it may be actually false, and that to help avoid detection he is clean-shaven these days.

BBC: Trimmed Bin Laden in media-savvy war