He introduced us to a sure card.

他向我们介绍了一个万全之策。

youdao

A clear conscience is a sure card.

清楚的意识是一张真诚的卡片。

youdao

We hold a sure card to be practical.

我们认为万全之策是切实可行的。

youdao

Please make sure you drop your library card at the front desk before you leave.

请确保在离开时，把图书卡放在前台。

have to 实战 - SpeakingMax英语口语达人

Why was the MasterCard rep so sure the card was compromised?

FORBES: Strange Coincidence Of The Pre-Christmas Scam

So what can you do to make sure your credit card information is safe?

BBC: Is e-shopping safe?

Be sure your business card is plain on the back and not smooth to allow you to write on it.

FORBES: Create a Healthy and Prosperous Business