灰犀牛
grey rhino
汉英翻译例句：灰犀牛不是随机的突发事件，而是一系列预警和明显征兆之后爆发出来的问题。灰犀牛袭击时，极具爆发力，且不可阻挡。
Grey rhinos are not random surprises, but problems that break out after a series of warnings and visible evidence. When the grey rhino attacks, its power is explosive and unstoppable.
