According to Einstein's theory, the clock on the plane would be expected to have lost time, due to being in motion over 80 hours compared to the clock on the ground.

按照爱因斯坦理论，相对于地面上的时钟，飞机上的时钟会因为80个小时的运动而减少时间。

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Although no form of matter yet discovered, moves as fast as or faster than light, scientific experiments have already confirmed that accelerated motion causes a traveler's time to be stretched.

虽然还没有发现一种速度与光一样或比光还快的物质，但科学实验已经证实，加速运动会延长旅行者的时间。

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So, if you just look at the position vector, and the velocity vector for any motion at any given time, then together, they determine some plane.

如果你看一下任何时刻运动时的，位置矢量和速度矢量，它们决定了某个平面。

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The two presidents met for the first time on the sidelines of the G-20 economic conference in London in early April and set in motion what Clinton says is an effort to raise the frequently contentious U.S.-Russian relationship to a higher level.

VOA: standard.2009.05.07

Factory owners have been doing such things for survival ever since Frederick W. Taylor invented time-and-motion studies more than a century ago.

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The United Parcel Service has for decades followed Taylor's time-and-motion theories to make its internal operations highly efficient, to the point of measuring the paces between a double-parked truck and a customer's doorstep.

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It's far more vulnerable to antiaircraft fire and can't communicate images directly to pilots, but Predator can send back real-time motion video to commanders.

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