Drag hinders the forward motion of the aircraft.

作用于空中的阻力阻碍飞机向前运动。

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This results in the forward motion of the aperture.

这一结果在向前运动的光圈。

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I use the forward motion to look and then breathe to the side.

我使用向前的动作看一下然后一侧换气。

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Democrats outnumber Republicans in the Senate, but do not possess a majority large enough to block Republicans from using a procedural motion known as a filibuster to prevent a vote from going forward.

VOA: standard.2009.05.31

At that meeting, the shark that is the euro zone will resume its forward motion.

WSJ: Agenda | Irwin Stelzer: Euro-Zone Shark Still Has Its Appetite

As well as their path, their forward motion, intensity and wind speed are all very difficult to predict, NOAA notes.

BBC: What will a hurricane do to the oil spill?

When momentum looses forward motion, oil bulls point to Chinese demand as being the floor under which oil can always stand.

FORBES: Why China Won't Save Oil Prices