If the light flashed on and off several times, the dolphins were supposed to press the left-hand lever followed by the right-hand one.

如果灯亮了又灭了好几次，海豚就应该先按左手的杠杆，再按右手的杠杆。

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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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He switched the control-lever to "off" position.

他把控制杆拨到“关”的位置。

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Among its many innovations were engines that could, with the throw of a lever, be run either off gasoline or off hydrogen inhaled straight from the gasbag.

FORBES: The long, loud history of hydrogen as a motor fuel.

The Vectra's case design is also top-notch: Pull a small lever, and the left side of the case comes off.

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