We've got 32 years to go and I won't back up easily."

VOA: standard.2009.12.10

they get in a rut and they can't get back up.

他们就栽进去了，出不来了。

不要放弃 - SpeakingMax英语口语达人

And what happens of course thereafter, as you'll remember, is that Lily pops up from the back seat: "Hi." He didn't know that she was there.

那么，在那之后发生了什么呢，正如你所记得的,莉莉从汽车后座突然跳出来，你好，他根本就不知道她在那儿。

耶鲁公开课 - 1945年后的美国小说课程节选

Because the math doesn't back up their words, which is frequently the case.

WHITEHOUSE: Press Briefing by Press Secretary Jay Carney,

The authors don't state as fact information that they can't back up and, in general, seem willing to label claims as either credible or not.

CNN: The Internet: the final frontier for space watchers

It made a lot of charges that they couldn't back up.

NPR: Colin Powell Comes into Focus in New Book