I just did it for a laugh, but it got out of hand.

我只是开开玩笑，然而却一发不可收拾。

《牛津词典》

The boys didn't mean any harm—they just did it for a lark.

那些男孩并无恶意—他们只是闹着玩罢了。

《牛津词典》

"I just did what a son should do." said Norman with a smile.

“我只是做了一个儿子应该做的事。”诺曼笑着说道。

youdao

"If al-Shabab takes more and more control within Somalia, it is going to be exporting violence the way it just did in Uganda."

VOA: special.2010.07.17

which I just did there, -mystring in fact, let me type it in-- mystring, with an equal sign, which is saying, assign or bind to that name the value of the following expression.

也就是这里我做的，实际上，让我输入，然后是个蹬好，意思就是说，把这个名字绑定到,后面表达式的值上去。

麻省理工公开课 - 计算机科学及编程导论课程节选

So yeah, I actually recently just did a group presentation

可以，事实上我们刚刚做了一个团队演讲。

要做好角色分担 - SpeakingMax英语口语达人

Markets may (and just did) correct for overvalue, but they can't abjure the laws of physics.

FORBES: Digital Rules

They in reality just did what any business owner with a product to market would do.

FORBES: Move up http://i.forbesimg.com t Move down

They had the technology, but they just did not seem to really believe in it.

FORBES: The Significance of Ericsson's Departure from Handsets