We hold a sure card to be practicable.

我们认为万全之策是切实可行的.

《简明英汉词典》

The company still hasn't found a sure card to reach its target users.

公司仍未找到接近目标用户的最佳方法.

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Consider me a sure card in that line.

把我看做那个行业中准能使事情成功的人吧.

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A good conscience is a sure card.

问心无愧乃万全之策.

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A clear conscience is a sure card.

[谚]只要问心无愧,旁人的指责可一笑置之.

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That will be a sure card to fetch him.

这个办法一定可以把他找来.

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