I bet my life that he will take my money and leave. I hope I win. (Para. 15)
Meaning: I risk my life on the chance that he will take my money and leave. I hope I'm right.
bet: v.1. risk money on the result of a race, game, match, or the future event
When you bet on a horse at a horse race, you hope the horse wins. 在赛马时把赌注下在马上，就指望此马会嬴。
Did you bet on the winner of the World Cup football game? 你在世界杯足球赛的获胜球队上下赌注了没有。
2. be very certain
If you say "I bet", you mean that you are sure something is true.
You will succeed, I bet. 我肯定你会成功。
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