He would not stand by and let his pet project be killed off.

他不会袖手旁观，任由自己钟爱的项目被否决。

《柯林斯英汉双解大词典》

In October of 2006, we incorporated as Foxmarks, inc. We had made the transition from pet project to startup.

在2006年10月，我们成立了Foxmarks有限公司，从此这件小项目正式启动。

youdao

Back in the firsthalf of the 1800s this guy Henry George Liddell picked up a pet project with afriend of his, Robert Scott.

追溯回19世纪前半页吧，这位名叫亨利·乔治·里德尔的伙子和他的朋友罗伯特斯考特搞了一个足以让他俩引以为豪的工程。

youdao

What grew as the pet project of Mark Zuckerberg, when he was a student at Harvard,has exploded - gaining eight new users ever second for the past 15 months.

VOA: standard.2010.07.23

Brown is now doing some consulting work and is unable to pursue his pet project.

FORBES: Whose Rolodex is it, anyway?

Hadley's other pet project is a system that breaks down hydrogen sulfide in sewer lines.

FORBES: Germ warfare

This house of cards scenario requires growth for their EUR pet project to survive.

FORBES: Eurozone Health Dependent on a Weaker Unit