By law, you are a child until you are 18.

按照法律规定，18岁之前是未成年人。

《牛津词典》

Things were going fine until you showed up.

你一露面就把事情搞糟了。

《牛津词典》

You really can't comment until you know the facts.

你的确不能在你知道事实之前进行评论。

《柯林斯英汉双解大词典》

You can't even begin to answer those questions until you hear the story of Dewey Readmore Books, the beloved library cat of Spencer,Iowa."

VOA: special.2009.02.23

You apply a force and the material will resist it until you have a force great enough to break the bonds.

如何你对它施加一个外力，材料能够承受,除非这个外力足够强大去打破键。

麻省理工公开课 - 固态化学导论课程节选

Until you're a proficient reader of a language, writing in our language is a fool's errand.

你只有成为一个熟练的读者，才有可能成为一个好的作者。

英语阅读：技巧 - SpeakingMax英语口语达人

It's like a jigsaw puzzle: you keep on looking until you've found the right piece.

CNN: James Doran-Webb: How artistry won the driftwood derby

That looks like a win for Mother Earth, until you step back and look at the big picture.

FORBES: Environmentalist, Spare That Tree

You get the opportunity to revisit this decision every year until you are dead.

FORBES: Navigating Medicare Multiple Choice And A Case Against Vouchers