It's an old trick but it just might work.

它是个老把戏，不过也许能管用。

《柯林斯英汉双解大词典》

It's an old trick, of course.

当然，这是一个惯用伎俩。

youdao

Playing on fears of foreign involvement is an old trick.

打害怕外国的卷入的牌不过是一个陈年伎俩。

youdao

Imagine a professional politician, like Romney, falling for such an old trick.

FORBES: Connect

Refusing to answer questions about the details of your policies until after the election, that's definitely not change. (Applause.) That's an old trick.

WHITEHOUSE: The White House

Just an old trick for a 33-year GM veteran.

FORBES: Mr. Burns' Dilemma