风云不测[fēng yún bú cè]
词典sudden change of fortune：风云不测。
1. 在布拉格，吉姆策划用一份有关深层潜伏间谍的假Noc名单引诱戈利岑上钩，可是风云不测，吉姆的三个下手和戈利岑都无端死去，其本人也受了伤。
In Prague, Jim planned on using a deep list of potential spies leave Noc lured Golitsyn hooked. But events eventuality, the three start, and Jim Golitsyn have died for no reason, I was also injured.