You can choose either black or blue drums - or special order any color you like.

您可以选择蓝色的或黑色的滚筒-也可根据您的要求特殊定做滚筒的颜色。

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Water is black or blue, while plant-covered ground is bright green. Bare earth around the Mississippi River is tan, and clouds are pale blue.

黑色或蓝色的为水体，亮绿色的为植被覆盖的陆地，棕褐色的为密西西比河周围的赤地，至于灰蓝色则为云层。

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Some are left-wing on economics but conservative on culture: just ask most black or blue-collar Christians what they think of gay marriage.

ECONOMIST: Can the Democrats close the God gap?

Once upon a time not too long ago, document signage involved downloading the document, printing it off, picking up a pen with either black or blue ink and signing off at the appropriate places, scanning the document once signed, uploading it, attaching the paperwork to an email, and then finally sending off that email back in reply with your signature.

FORBES: Signed, Sealed, Delivered: How HelloSign Is Changing Electronic Document Signatures

When last seen he was last seen wearing black trainers, dark blue or black jogging bottoms, a blue fleece and a black beanie hat.

BBC: Ralph Hebden