It must have cost a tidy sum.

这准花了相当大的一笔钱。

《牛津词典》

He's put aside a tidy sum for his retirement.

他存了一笔相当可观的钱以备退休之用。

youdao

That is a tidy sum in Nepal, South Asia's poorest country.

在南亚最穷的国家尼泊尔，这是一笔很大的数目。

youdao

And heirs might end up with mixed feelings after learning they went for years without knowing they someday would inherit a tidy sum.

WSJ: Can You Trust Your Kid With $5.25 Million?

For a tidy sum and some untidiness, Kinect enables the kind of motion-sensing gameplay that has become the Wii's hallmark without having to strap the controller to various limbs (as with EA Active for Wii).

ENGADGET: Switched On: Token gestures

Many of the original holders of the bonds, weary of waiting for a deal, have sold them to others for as little as 12 cents on the dollar, so the purchasers of these bonds stand to make a tidy sum.

ECONOMIST: Argentina's debt negotiations