adj.(方法、计划、系统等设计得)万无一失的,肯定成功的;
例句:
I spent the day working out a foolproof plan to save him.
我花了一天的时间想出了一个营救他的周全方案。
It has to be foolproof when he comes home.
他回家的时候,一定要绝对保险.
That's a foolproof plan for fast and heathy weight loss.
那是一个肯定成功的快速健康的减肥方法.