Because each thread rotate to the opposite on both ends of the screw, the screw rotates, formed by the screw meshing line pump working chamber.

由于每根螺杆两端螺纹的旋向相反，螺杆转动时，由螺杆啮合线形成的泵工作腔。

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Combination of electric pump-controlled mechanical structure even more than the traditional mechanical-line pump is simple, less the number of parts is expected to achieve higher reliability.

电控组合泵的机械结构甚至比传统的机械直列泵简单，零件数目少，可望达到较高的可靠性。

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In response to the October 1987 stock market crash, the Fed turned on its money pump and over the next year final sales shot up by 7.5%, well above the trend line.

为了应对1987年美国股市崩盘的危机，美联储增发大量货币，第二年最终销售暴涨7.5%，大大高于趋势线。

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Rich investors will continue to line up to pump cash into his funds.

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And so one of the things I did, because you have to remember, right after the fall of Saddam Hussein, there was no telephone service at all, no electricity at all, days-long line for gasoline at the pump.

NPR: Aaron Glantz: 'How America Lost Iraq'

Wave it near a reader, whether on a gas pump or in the fast-food line, and if you have enough credit on the card it's linked to the payment takes only seconds.

FORBES: Time And Money Together