One way is to have a thorough set of unit tests for the code: the code should pass the tests both before and after refactoring.

第一种方法是对代码进行一套完全彻底的单元测试：在重构之前和之后都必须通过这样的测试。

youdao

Art thou not it which hath dried the sea, the waters of the great deep; that hath made the depths of the sea a way for the ransomed to pass over?

使海与深渊的水干涸，使海的深处变为赎民经过之路的，不是你吗。

youdao

The best way to determine if a gym is right for you is to get a guest pass.

对你来说，测定一个健身房是否适合你的最好方法是获取一个新顾客通行卡。

youdao

"The goal must be a model in which protectionism gives way to openness, the reins of commerce pass from the few to the many and the economy generates jobs for the young.

VOA: special.2011.05.27

Warrington took just two minutes to break the deadlock when, with Saints expecting a pass, the artful Briers tricked his way in for his first try of the season against his old club.

BBC: St Helens 18-25 Warrington

The Senate voted 60 to 39 to pass the Wall Street Reform Act on Thursday afternoon, clearing the way for President Obama to sign it into law.

FORBES: As Senate Passes Financial Reform, Wall Street Braces For What Comes Next

They came back from a 22-point deficit and made it a heart-stopper, thwarted in the end only by a missed pass on 4th and goal (Great name for a football book, by the way.) Was there defensive pass interference on the play?

FORBES: The Baltimore Ravens Beat The San Francisco 49ers In A Wild Super Bowl