That's immediate consequence of the conservation of angular momentum.

这是角动量守恒的，立竿见影的效果。

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The conservation of angular momentum explains why disks are so prevalent in the universe.

角动量的守恒解释了为什么圆盘在宇宙中这么普遍。

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Now we're going to apply for the first time in systems like this, the conservation of angular momentum.

这是我们第一次，在这种系统里使用，角动量守恒定律。

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This is because of conservation of angular momentum, the same property that causes ice skaters to spin faster if they draw their arms in.

MSN: Giant gas geysers erupting from Milky Way galaxy