The idea for the experiment came from observing the birds using tools to pick at random objects, such as a picture of a spider that was printed on some cloth.

这个实验的想法来自于观察鸟类使用工具随机挑选物体，比如在一些布上印有蜘蛛的图片。

youdao

There is no need to pick at him all day long. He's a child after all.

不要老是对他唠唠叨叨， 他毕竟还是个孩子嘛!

《新英汉大辞典》

Historians will find things to pick at-how could they not in a whistle-stop journey through 600 years?

历史学家会发现有东西可写-他们怎么会在短暂逗留后停下600年的历史进程呢？

youdao

"They need to start getting mammograms at age 40,". "Mammograms pick up cancers when they're smaller."

VOA: standard.2009.12.25

But now we're going to take a close look at Deuteronomy and we'll pick up with Joshua on Wednesday.

现在，我们将详细的学习申命记,在周三的时候再开始约书亚记。

耶鲁公开课 - 旧约导论课程节选

And so people definitely go down there to pick up some items that they can't get at Tom Ford or Diesel.

所以人们一定是去那儿采购一些在汤姆•福特和狄塞尔买不到的东西。

关于SOHO - SpeakingMax英语口语达人

Obviously, anybody with grievances has a long, well-publicized history of the LAPD to pick at.

CNN: LA cops stalked by suspect -- and a brutal past

We start to pick at it, add to it, tweak it a little, suggest that the creative team work on this or that to help make the idea really great.

FORBES: When Reviewing A New Idea, Never Forget Its First Impression

By then, you will have an even more advantageous point to pick at the carcass of the fatally flawed by design as many argued over a decade ago euro zone.

FORBES: The Bailout Era