Not only is the bridge equipped to handle four lanes of traffic; it also has a double-track railway.

这座桥不仅拥有四个行车道，还有一个双轨铁路。

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The same firm has also signed a deal with Kenya to double the power it temporarily supplies the country, to 290MW.

同一家公司与肯尼亚签署了把提供给这个国家的电量临时提高一倍到290MW的协议。

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Capturing the resulting methane has a double benefit. As well as yielding energy, it also prevents what is a potent greenhouse gas from being released into the atmosphere.

收集发酵产生的沼气有两大益处：其一，能够获得能源；其二，能够阻止甲烷(一种强效温室气体)进入大气层。

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It also has a summerhouse, various outhouses and a double garage.

BBC: JK Rowling: Author sells Merchiston house in three weeks

Pyongyang is angry over tough new international sanctions over its Dec. 12 rocket launch that also put a satellite into space, and it has accused its rivals of applying double standards toward the two Koreas' space programs.

NPR: SKorea: Satellite Working Normally, Sending Data