She shook a little bell on the table, and a small black girl about 12 years old ran into the room.

VOA: special.2009.01.17

An unreinforced response is when the bell goes on but there's no food.

非强化反应是有铃声但却没食物的时候。

耶鲁公开课 - 心理学导论课程节选

Based on Henry the 8th's six wives. Henry the 8th? Ring a bell?

关于亨利八世的六个妻子的故事，亨利八世？听起来很熟悉？

正在准备庆典 - SpeakingMax英语口语达人

There is also an image of a bell inside a copper-colored inkwell on the front of the note.

VOA: special.2010.11.15

But it turns out that if you make the voters distributed more realistically, let's say like on a bell-curve shape, it makes actually no difference to the result at all.

但事实上,就算我们让选民分布更符合实际情况,比如说是按钟形分布的,但这实际上对结果没有什么影响

耶鲁公开课 - 博弈论课程节选

"In my book I call this the empathy bell curve. And part of what I'm exploring in the book is what determines where an individual scores on this empathy bell curve.

VOA: special.2011.08.10

I am convinced--even though I'm sure that the Toyota Motor Company didn't organize it this way— I am convinced that on my automobile when I do not plug in my safety belt that there is a bell ringing "DING, ding, ding, DING, ding, ding."

我相信,尽管我确信,丰田汽车公司不会这样组织,我确信在我车上,当我没有系上安全带的时候,会有响铃,"叮,叮,叮,叮,叮,叮"

耶鲁公开课 - 聆听音乐课程节选

That's a bell-shaped curve, but it's centered exactly on .2.

这是条钟形曲线,它关于x=0.2对称

耶鲁公开课 - 金融市场课程节选