This spinning area surrounding the event horizon is called the ergosphere and has an ellipsoidal shape 这活动视界周围旋转的区域是所谓的能层而具有椭圆形。
2.
Anything inside the ergosphere will be dragged by the black hole and rotate with it but it can still escape 在能层内的物质会被黑洞自转所带动，但仍有机会逃离黑洞的魔掌。
3.
However , because space - time itself is moving in the ergosphere , it is impossible for objects to remain in a fixed position 然而因为时空本身是在能层里移动，物体保持在固定位置是不可能的。
4.
Objects grazing the ergosphere could in some circumstances be catapulted outwards at great speed , extracting energy ( and angular momentum ) from the hole , hence the name ergosphere ( " sphere of work " ) because it is capable of doing work 擦过能层的物体就会在某个情形下以极大的速度弹射出去，从黑洞里提取能量（与角动量） ，因此叫能层（ “做功的球）因为它有能力作功。
5.
If we send something to the inside of the ergosphere , and split it up into two parts , one goes in the black hole while the other comes out . if we correctly arrange the splitting , the part coming out can be made to have a much higher speed , hence higher energy 方法是把一件物体放进能层，然后把物体分成两部分，让一部分堕进黑洞，另外一部分逃离黑洞若我们适当地选择它们的质量分离的时间等等便可以让逃离的部分以更高速度即更高能量离开黑洞。
