The fruit wrapping and twisting mechanism for packing fruit with plant fiber paper includes a pressing lever, a fruit supporting mechanism and a fruit clamping mechanism set from top to bottom.

一种植物纤维纸水果包裹扭结机构，由一压杆、一托果机构和一夹果机构三部分 构成，三者呈上、中、下分体设置；

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Next, the researchers trapped the robots in cages and gave the rats the opportunity to release them by pressing a lever.

接下来，研究人员将机器老鼠困在笼子里，让老鼠有机会按下杠杆来释放它们。

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In the study, scientists at Wake Forest University and the University of Southern California trained rats to learn a task, pressing one lever after another to receive water.

在这项研究中，威克森林大学和南加州大学(ubc)的科学家们训练了大鼠去学习一个任务，按下一个又一个的杠杆以获取水。

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Well, maybe unsurprisingly, what they do is, they keep pressing the lever.

可能不出所料地，它们会，不停地按杠杆。

耶鲁公开课 - 死亡课程节选

And one of their behaviors is pressing the lever.

其中的一个动作便是压杠杆。

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But when Dr Ciccocioppo took half the rats back to their drug den, and then flashed the light and sounded the beep, the animals immediately set about pressing the lever that they thought would deliver cocaine.

ECONOMIST: Addiction

Electrodes attached to the brain of a host "encoder" rat in Brazil processed the motor-oriented mental activity for a desired behavior, such as pressing a lever on cue, and converted it into a signal that was then received by a "decoder" rat as far away as Duke's US campus.

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To find out which areas these are, Dr Ciccocioppo killed some of his rats in the very act of lever-pressing.

ECONOMIST: Addiction