Until now, it is hard for me to understand and know why all of these must be happened.

直到现在，我都很难理解为什么这一切会发生。

youdao

Until you understand all sides of a topic, you don't understand it.

如果不是吃透所有的立场和观点，都不算理解了这个主题。

youdao

Revise the goals until all parties agree on them and understand them.

修订目标，直到各方理解他们，并对此达成一致意见。

youdao

"We'll just keep re-electing, re-electing and re-electing until we get people in there who understand what the constitution means to all of us."

VOA: standard.2010.04.19

But I wasn't sure what to make of it all, how to understand my experience, until 10 days later, on Yom Kippur.

WSJ: Fearlessness and Loving in Cairo | Traveler's Tale