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。

《柯林斯英汉双解大词典》

In other words, sprinters sacrifice the mechanical advantage of a long lever for the benefit of a stronger push-off.

换句话说，短跑选手牺牲了长杠杆所带来的力学优势从而获得了更为迅猛的起跑速度。

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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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