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。
This gives improved retractor blade stability with the mechanical advantage of a lever.
这样增加了牵开翼的稳定性，同时兼具杠杆原理的力学优势。
This gives improved retractor blade stability with the mechanical advantage of a lever.
这样增加了牵开翼的稳定性，同时兼具杠杆原理的力学优势。
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