One factor contributing to the two-party system in the United States is the single-member district system of electing Representatives.

导致美国两党制的一个原因是，每个国会议员选区只能选出一名代表。

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Tip of series pipelines machines, the same applies to water quality sub-district system, or even large cities different kinds of water pipe network system water groups to achieve effects.

同样蝶佳系列管线机更适用于小区分质供水体系，甚至是城市大型管网分质供水体系，实现群体供水之功效。

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The road improvements and accompanying maintenance system had helped make the district centre accessible throughout the year.

"道路的改善和配套的维修系统使这个地区中心全年都能够与外界连通。

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Doubters know that the state-by-state, district-by-district system by which we elect the House distributes the vote to protect incumbents.

NPR: What Would It Take To Flip the House?

Israel would have to consider its electoral laws and weigh the prospect of moving from a proportional representation system to a direct, district system.

CENTERFORSECURITYPOLICY: Israel's Only Two Options

From 2001 to 2006, bills proposing adoption of the district system were introduced in many states, but failed to pass, according to the NCSL website.

CNN: Some GOP-led states look at electoral vote changes