On other occasions an image can also be obtained on the object plane.

满足其它条件也能成像于物平面。

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Segmentation and tracking of video moving object is used for guiding the extraction of video object plane from the video sequence.

为了生成视频对象面，需要对视频序列中的运动对象进行有效的分割；

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When we throw up an object in a gravitational field, you have the trajectory in a plane.

当我们把一个物体，放到引力场中，我们会得到在一个平面上的轨迹。

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And in the plane there is some other object.

在平面上有一个物体

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That'll say the velocity of the object with respect to the ground, the velocity of the object with respect to the plane, the velocity of the plane with respect to the ground.

可以得到物体相对于地面的速度,物体相对于平面的速度,物体相对于地面的速度

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When you have a velocity in the moving plane frame and you want to find the velocity on the ground, you should add to every object in the plane the velocity of the plane with respect to the ground.

当你在运动的飞机上运动,然后你想找到相对于地面的速度,你就应该给每个物体加上,飞机相对于地面的速度

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The first officer saw a bright object ahead of the plane -- the planet Venus -- and mistook it for the approaching C-17.

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And the infinite emptiness of the brilliant sky above means that on the rare occasions when an object, such as a plane or a hot-air balloon, does pass through, the bright contrast lends it such a fierce intensity that it confuses the eye.

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Mach is a measure of the ratio of the velocity of an object, in this case a plane, to the velocity of sound, which equals Mach 1, or 761.2 miles per hour.

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