有时说话者故意为之，以达到某种交际目的。

Sometimes the speaker intentionally makes ambiguity in order to achieve his goal.

youdao

他说图片会使这种故意为之的主旨令人无法抗拒。

He says the pictures might be overwhelming the intended message.

youdao

现在我知道黛德不是，而假装怀有证据。那就是故意为之了。

Now, because I'd know it wasn't Dede but could pretend to have proof, I'd be doing so on purpose.

youdao

It turns out they're relatively simple to find even -- when they've been deleted whether accidentally - or in some cases intentionally-- that too is part of the job undeleting things that people had deleted.

原来，这些图片的模式很容易找到,即使他们已经被删除,无论是因为意外还是有人故意为之-,要恢复已删除的东西,需要做这部分的工作。

哈佛公开课 - 计算机科学课程节选