a sure card

• 万全之策

a sure card的用法和样例：

例句

1. We hold a sure card to be practicable.
   我们认为万全之策是切实可行的。
2. The Japanese war lords had looked for a certainty.
   日本军阀要想寻求万全之策。
3. He is a man whom you can depend on.
   他是个你可以信赖的人。
4. We must find a reliable person to deal with it.
   我们必须找到一个可以信赖的解决这个问题的人。

词汇搭配

• play a sure card 采用可靠的计划...