At present, China's low-rent housing system is in the initial stage, in the bottleneck of funding constraints, the slow development.

当前，中国的廉租房制度正处在起步阶段，在资金瓶颈的制约下，发展缓慢。

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The railway was completed, will be effective in relieving Inner Mongolia region in east-central coal sinotrans by the "bottleneck" constraints.

该铁路建成后，将有效缓解内蒙中东部地区煤炭外运的“瓶颈”制约。

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The breakthrough of the constraints has become not only the most difficult problem and bottleneck in development cared by the industry, but also a hot spot and focus to academic researchers.

怎样突破电子商务市场的支付手段的制约，一度成为业界最为关切的重大难题，也是学界研究的一大热点问题。

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