no danger of anything going wrong
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管理这地方的电脑据说可以做到万无一失。
The computer that runs the place is supposed to be fail-safe.
由他开车保证万无一失。
With him at the wheel, we’re a hundred per cent safe.
所以他保证万无一失
So there are no mistakes.
但是它也不能保证胃内容物万无一失。
However, it does not guarantee a stomach free of gastric contents.
正确完成此事并尽全力确保万无一失。
Put more effort and work to make sure that the job is done well and correct.
万无一失
万无一失，是汉语成语，意思是一万次中不会有一次失误，谓极有把握。例句有“只有预防万一，才能万无一失”。 该词出自《史记·淮队侯列传》的“以此参之，万不失一。”汉代枚乘《七发》的“孔老览观，孟子持筹而算之，万不失一。” 近义词有十拿九稳，反义词有防不胜防。
