Food was a big problem in China in the past.

在过去，粮食是中国的一个大问题。

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I see. Pollution is a big problem in China, especially in the cities.

在中国，污染是个大问题，尤其是在城市里。

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Poverty is a big problem in the world, but China has done a good job to deal with it and made the proud achievement.

贫困是世界上的一个大问题，但中国在处理这个问题上做得很好，取得了令人骄傲的成就。

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In the emerging markets inflation is the big problem, particularly in China (see chart).

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