adj.万无一失的，使用简便的，完全可靠的

This recipe is foolproof, even beginner cooks can make it perfectly.
这个食谱是万无一失的，即使是初学者也能做得很完美。
The new security system is designed to be foolproof against hacking attempts.
新的安全系统设计得无懈可击，能有效防止黑客入侵。
If you follow these instructions carefully, the process is practically foolproof.
只要你仔细按照这些指示操作，这个过程几乎是不会出错的。
Our backup plan is foolproof, ensuring we meet the deadline even if the primary plan fails.
我们的备选计划万无一失，即使主要计划失败也能确保按时完成任务。
This foolproof guide to DIY home repairs will have you fixing things like a pro in no time.
这本万能的DIY家居维修指南能让你迅速成为修理高手。
The software comes with a foolproof installation wizard that walks you through each step.
该软件附带了一个简易安装向导，会引导你完成每一步操作。
Investing in gold has long been seen as a foolproof way to protect one's wealth.
长期以来，投资黄金被视为保护个人财富的稳妥之策。
The lock on this safe is advertised as being foolproof, resistant to any attempt at picking.
这个保险箱的锁号称万无一失，能抵抗任何开锁尝试。
The app offers a foolproof method for tracking your daily calorie intake.
这款应用提供了一种简单易行的方法来跟踪你每天的卡路里摄入量。
With its intuitive interface, this camera is virtually foolproof for users of all ages.
凭借其直观的界面，这款相机对所有年龄段的用户来说几乎都是操作简便的。