Each plate of food was weighed before it went out to a customer and when it came back to calculate how much food was left over.

每个盘子的食物在正式端上桌之前都被称了重量，在客人用餐完毕后，盘子被端了回来，研究者们又称取了剩下食物的重量。

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Such a back-coupling, in which the position of the moving plate has an impact on the forces that move it, could produce complicated and varying motions.

在这种反向耦合中，移动板的位置对移动它的力有影响，可以产生变化的复杂运动。

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Ice crystals should be plate shaped. They float in the air close to the ground reflecting light back downwards.

冰晶需呈片状，它们悬浮近在地面的空中，将光线向下反射。

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Baumgartner -- who was driving a dark blue Ford F-150 with what was likely his mother's license plate -- will be brought back to Edmonton, the statement read.

CNN: Suspect in Canada killings caught at the border

The Magellan Wireless Back-Up Camera kit comes complete with a license plate mountable camera, transmitter, wireless receiver, vehicle power adapter, installation hardware, and instructions.

ENGADGET: Wireless Back-Up Camera for the Magellan RoadMate checks your six

The initiative, which dates back to 2005, involves an extensive network of security cameras, licence-plate readers and weapon-detectors which work together to spot threats and deter terrorist surveillance.

ECONOMIST: New York expands its counterterrorism monitoring system