And in fact, you can take the wire, the electrode, and hook it up to a lever and teach the rat how to push the lever and give itself a little burst of pleasure.

事实上可以把电线，电极，连接到一个杠杆上，教老鼠,推动杠杆获得快感。

耶鲁公开课 - 死亡课程节选

In later experiments, when they were allowed to push a stimulation lever on their own accord, they self-stimulated hundreds of times per hour.

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Insert a foil pack of powdered insulin into a slot, prime the pump with a lever and push a trigger that releases the cloud of insulin into a clear plastic chamber.

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Pentagon officials already are concerned that if the military rejects the Baker panel's suggestions, conservatives on Capitol Hill will use the study as a lever to push for legislation banning mixed-gender basic training altogether.

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