We have an old saying: A gift from a wicked man is a trap.

VOA: standard.2009.11.10

So, what you do is you set up a couple of displays, one where the block is stopped, the other one where you take this away with a trap door and it keeps going.

所以,你可以设计几个演示,一个是木块被挡住了,另一个是用活门把木块挪开,使得屏板继续上升

耶鲁公开课 - 心理学导论课程节选

Suppose standing on the bridge next to the fat man, I didn't have to push him, suppose he was standing over a trap door that I could open by turning a steering wheel like that.

假设我站在桥上，胖子就在我旁边，我不用去推他，假设他踩在一扇活板门上方,而活板门可以通过转动方向盘来开启。

耶鲁公开课 - 公正课程节选

"Jamboree is amazing[... All these opportunities that I have been able to do like fly a plane,archery,trap shooting, rifle shooting,anything like that, and I have gotten great leadership experience."

VOA: special.2010.08.06

So obviously, not a good thing, but amazingly easy to fall into this trap.

天呐，他真棒，所以很明显，这不是一件好事，但是很容易上当。

麻省理工公开课 - 计算机科学及编程导论课程节选

Still others temporarily trap a pollinator.

VOA: special.2010.04.06

But... Or say that the car is hurtling towards a switch that will drop the trap.

但是。。。或者是列车飞驰而来时,正好可以触发活门开关。

耶鲁公开课 - 公正课程节选

It's a great experience. All these opportunities I have been able to do like fly a plane, archery,or trap shooting, rifle shooting,anything like that, and I have gotten great leadership experience."

VOA: standard.2010.07.31