translation.en: It's also about 40 percent more efficient than a regular wheelchair, and because of the mechanical advantage you get from the levers, you can produce 50 percent higher torque and really muscle your way through the really, really rough terrain.
translation.zh: 比起一般的轮椅，也多了百分之四十的效率 也由于杠杆的机械特性 你可以多产生百分之五十的扭力 让你可以走过非常崎岖的道路