That's actually a pocket of very, very intense magnetic field.

这实际上是一个非常非常强的磁场。

My work in the 1970s focused on the black holes that can result from such stellar collapse and the intense gravitational fields around them.

我在1970年代的工作重点是这种恒星坍缩及其周围强烈的引力场可能导致的黑洞。