物体摆在这里，只因重力作用开始运动。

And this object is going to be put on here and just because of gravity, it will go.

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物体从t=0时开始运动,其速度为负。

The object starts out at t equals zero with a negative velocity.

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当你开始运动时，你消耗的是碳水化合物，或者糖类。

When you first begin to exercise, you burn carbohydrates or sugars.

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But the later, the second half the 20th century, it had a new Palestinian political movement established by the Palestine Liberation Organization, PLO the PLO.

而之后，20世纪后半叶，有新的巴勒斯坦政治运动,是由巴解组织开始的，也就是。

普林斯顿公开课 - 人性课程节选

Now, at the left of the origin, it turns around and starts coming to the origin and going to the right.

现在,到了原点的左边,它又转向,开始向原点运动,并到了原点右边

耶鲁公开课 - 基础物理课程节选

Another big question that came up particularly starting in the 70s, women's movement. But in the 80s and into the 90s was a movement called "women's rights are human rights".

另一个重要问题就是,从70年代开始的女权运动,但是，在八九十年代时，另一场运动发展起来,叫做，“女权即人权“

普林斯顿公开课 - 人性课程节选