They may make it hard to obtain logging licences and other permits, either through incompetence or spite, or they may invent new ones for fun.

它们可能由于不称职或出于恶意，使获取伐木许可证及其他许可证变得困难；它们还可能发明新许可证来取乐。

youdao

There's been a lot of work done on these over the years, but in fact, it's pretty hard to invent a good hash function. So my advice to you is, if you want to use something was a hash, go to a library. Look up a good hash function.

已经做过了很多的尝试和努力,但是事实是，很难发明出一个好的哈希函数,所以我给你们的建议是,如果你们想使用哈希功能,到函数库中查找一个好的哈希函数。

麻省理工公开课 - 计算机科学及编程导论课程节选

Things that are so random and quirky that as a writer, I know how hard that stuff is to invent, and it really had the ring of truth to it.

CNN: Sebastian Junger: The bin Laden tape and the war in Afghanistan

Notice that it's easy to invent new abbreviations but hard to make up new pictograms.

WSJ: David Gelernter: The Pros and Cons of Cyber-English

Attempts are afoot to re-invent boarding as a progressive, child-friendly option for the hard-pressed modern family.

ECONOMIST: Education: The snowman goeth | The