北京作为2008年夏季奥运会的主场地，其空气质量备受关注。
The air quality in Beijing was concerned by people all over the world during 2008 Summer Olympic Games.
主场作战意为着更熟悉的场地和天气状况，以及更高的观众支持率（关于这一点，11月25日做客布里斯班与澳大利亚进行系列赛的英格兰板球队队员将有切身体会）。
Playing at home means familiar pitches and climatic conditions, and a more supportive crowd (just ask the English cricketers whose series against Australia starts in Brisbane on November 25th).
波托马克河是一个世界级的皮划艇场地，也可作为赛艇项目的主场，而阿纳科斯蒂亚河也已准备好了。
The Potomac River is a world-class kayaking venue and a possible host for rowing, and the Anacostia is well on its way.
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