Then, in 1971, I proved that any stationary rotating black hole would indeed have such an axis of symmetry.

然后，在 1971 年，我证明了任何静止的旋转黑洞确实具有这样的对称轴。

The general description of black holes, developed in the 60 s is called the no hair theorem and  states that a stationary black hole can be completely described by just three parameters: mass, angular momentum and electric charge.

上世纪60年代发展起来的黑洞的一般描述被称为无毛定理，并指出静止的黑洞可以完全用三个参数来描述：质量、角动量和电荷。