Here the machines were liable to jam up.

这里的机器容易出故障。

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If you want to stop that plan from being successful, you must figure out a way to make those gears jam up.

如果你要阻止计划成功实施，就必须想办法卡住那些转动的齿轮。

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More than 200 police from Inner Mongolia, Hebei and Beijing worked around the clock to break up the jam, state-run China Radio International reported.

据官方媒体中国国际广播电台报道，来自内蒙古、河北及北京的200多名警察为清除京藏高速大拥堵日以继夜地工作。

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Limited bandwidth can jam up traffic, forcing some slices of processing to wait in long queues.

FORBES: Sharing Power

And the states have all, have plenty of power to jam up recounts even if there is a paper trail.

NPR: Political Wrap: DeLay Primary, Domestic Wiretapping

But the request to hold off the change comes after several high-tension days at NYSE and growing concerns among traders that the initiation of Reg NMS today will jam up communications among exchanges.

FORBES: Magazine Article