It's good to have a friend to fall back upon.

有个可依靠的朋友是很好的。

youdao

If we are to deal purely with Twain the humorist, we have to fall back upon the details of his art.

假如我们把马克·吐温当作一个单纯的幽默作家来看待，我们得转回头分析他的技巧。

youdao

So we often have to fall back upon more gifted souls to interpret for us what we mean but cannot say.

所以我们通常不得不依靠有才华的人为我们解释我们表达不出的意思。

youdao

He notes: When we see a stroke aimed and just ready to fall upon the leg or arm of another person, we naturally shrink and draw back our own leg or arm and when it does fall we feel it in some measure and are hurt by it as well as the sufferer.

他说过，当我们看到有人要打,别一个人的腿或手臂，我们会不由自主的畏缩，手脚拢起来,当这一下打下来，某种程度上来说,我们会感受到和被打者一样的疼痛。

耶鲁公开课 - 心理学导论课程节选

When under attack, Europe's leaders fall back upon 60 years of peace in Europe.

BBC: EU Nobel peace prize: No minor achievement

So instead, Republicans will fall back upon a Plan B, basically a series of stunts.

CNN: GOP won't deal, health care law won't change

The point though is that the act of violence is still open to dispute centuries later, and many people tend to fall back upon emotional rather than factual certainty.

BBC: Boston's past lessons on the truths people believe