Mice were trained to push levers to get either of two rewards. Press one lever, out comes a drop of sugar water.

研究人员训练老鼠去推动控制杆，推动之后能得到两种报酬中的一种——推动第一个控制杆，就会渗出一滴糖水；

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Push the tiny lever on the lock and let the door lock itself.

推锁上的小控制杆，让门自动锁上。

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For example, macaque monkeys are also highly social animals, and scientists put them in cages and taught them how to push a lever so that they could get cocaine.

比如，猕猴也是具有高度社会性的动物，科学家把他们放在笼子里并教他们学会怎样推动控制杆得到可卡因。

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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。

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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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