Just then, someone knocked at the front door.

就在那时，大门口有人敲门。

《牛津词典》

Just then, the door opened.

就在那时，门开了。

youdao

Just then, the little mouse happened to pass by.

就在那时，小老鼠碰巧经过。

youdao

That leaves just four. I want to see the last one fall before it gets dark.Then I'll go,too."

VOA: special.2009.08.01

I've got to do the test, and then I just do the move. So the general formula is that.

比较一下然后移动,因此一般的公式是这样的。

麻省理工公开课 - 计算机科学及编程导论课程节选

There's just a kind of a stand and you put the ball on the stand and then you just hit it.

只有一个台子，你只需把球放在台上，然后击打它。

会打棒球吗？ - SpeakingMax英语口语达人

But to ask me just then, as I was taking in the night .

NEWYORKER: History of a Disturbance

However, just then, another mechanic, a guy by the name of Santorum, walks up.

FORBES: Economics Are The Faulty "Mechanics" Of The Presidential Race

But, just then, the Internet stock market bubble burst and so did his fortune.

NPR: Millionaire Follows Dad's Footsteps �� Into Space