take my chance
碰运气
I'll have to take my chance with other applicants for the job.
我将不得不碰碰运气和其他求职者来竞争这份工作。

knock off
击倒
People don't just knock one another off like this unless there's big money at stake.
如果不是为了冒险赚大钱，人们不会像这样彼此残杀。