This recipe is foolproof ─ it works every time.

　　這個(gè)食譜絕對管用，每次都萬無一失。

　　The system is not 100 per cent foolproof

　　這個(gè)系統(tǒng)并非是萬無一失。

　　I spent the day working out a foolproof plan to save him.

　　我花了一天的時(shí)間想出了一個(gè)營救他的周全方案。

　　Always ensure you have a foolproof way to get paid.

　　永遠(yuǎn)確保你拿得到錢。

　　This new system is supposed to be foolproof.

　　據(jù)說這個(gè)新系統(tǒng)不會(huì)出毛病。