黑洞形成的关键是在一个足够小的容积内填充足够多的质量或能量，正如高量星将要爆炸的时刻。
The key to forming a black hole is cramming enough mass or energy into a small enough volume, as happens when a massive star collapses.
滑动容积计量方式可以很容易在变换填充物。
The glide volumetric metering way very easily in the transformation of filling material.
采用滑板运动容积计量方式，可以快速调整填充物重量。
Skateboarding volume measurement used, it can be quickly adjusted the weight of filler.
采用滑板运动容积计量方式，可以快速调整填充物重量。
Skateboarding volume measurement used, it can be quickly adjusted the weight of filler.
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