If you want to push a little bit farther, you can set a stretch goal.

如果你想更进一步，你就可以设定一个延伸目标（难以达到的，需要努力及创造力来达到的目标）。

Like, if you've spiffed up your secret underground base, your stretch goal may be to build yourself another jetpack!

比如，如果你已经装饰了你的秘密地下基地，你的延伸目标就可能是为自己再做一个喷射背包！

They're used for a higher purpose, and that's to get collective commitment to truly stretch goals.

它们被用于更高的目的，那就是获得对真正延伸目标的集体承诺。