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

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

There's just one problem: there is no bell tower for the fatal plunges.

BBC: For the birds: Hitchcock��s California

It had no steeple, no stained glass, no bell tower, but it was the house of Abraham and Isaac, of Moses and Joshua, of the Lord thy God.

NPR: Excerpt: 'The Prince of Frogtown'

There is an old adage on Wall Street: no one rings a bell to signal a market top or bottom.

FORBES: End Of Easy Money, Beginning Of A Desolate Future