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The housing problem in the inner city is a key problem.
在市中心，住房问题是个关键问题。
youdao
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It is hard to solve the housing problem in the inner cities.
解决城市中心的住房问题是很困难的。
youdao
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It is hard to solve the housing problem in the inner cities.
解决城市中心的住房问题是很困难的。
youdao