两个物体间距离越近，两者间的相互引力越大；但引力也作用于其自身，所以，在极小距离时开始反馈环。
The closer two objects are to each other, the stronger the gravitational attraction between them; but gravity also ACTS on itself, and as a result, at very small distances a feedback loop starts.
科尔黑洞中心是不是奇点而是奇环-由自身动量维持的一维环形。它有两个视界(外部视界和内部视界)以及一个椭圆形的能层(ergosphere)。
At the centre of a Kerr black hole, there is no point singularity, but rather a ring singularity-a spinning one-dimensional ring held open by its own momentum.
一种关于环境的变化与人成长有关的唯物主义理论忘记了一点环境是由人改变的，而且对于教育教育者自身来说是必要的。
III the materialist doctrine concerning the changing of circumstances and upbringing forgets that circumstances are changed by men and that it is essential to educate the educator himself.
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