Why go to the expense of buying an electric saw when you can borrow one?

你能借到电锯，却为何去花钱买呢？

《柯林斯英汉双解大词典》

Some employers go to the expense of offering classes to improve workers' English.

有些雇主花钱开培训课来提高工人的英语水平。

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But in practice few are likely to enter this legal maze, and go to the expense of scanning millions of books, without any certainty of making money.

然而事实上，很少有公司愿意来趟这个浑水——扫描几百万本书，还不确定能不能赚钱。

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It's a little silly to go to the expense of sending out 90 million letters to give a two-week heads-up on the checks going out in the mail.

CNN: Senate Democrat blasts tax rebate letter

Until recently, bringing the Internet to the car has been an issue due primarily to the fact that few manufacturers wanted to go to the expense of adding a wireless communications module to the vehicle, particularly one likely to be obsolete in the lifetime of the car.

FORBES: Automotive/Tech Companies Trying to Bring the Web to the Car

The world is barely getting to grips with the notion of 4K, which already solves pixelation at regular viewing distances, so why did the BBC and Japanese broadcaster NHK go to the expense of sending a dedicated SHV video truck, a SHV audio truck rigged for 22.2 channel sound, and the world's only three 8K Ultra HDTV cameras to London?

ENGADGET: BBC shows off 33-megapixel Super Hi-Vision Olympic footage, we ask: why?