translation.en: And as they slide their hand down the lever, they can push with a smaller effective lever length, but push through a bigger angle every stroke, which makes a faster rotational speed, and gives you an effective high gear.
translation.zh: 当他们把手顺着杠杆滑下去 他们推的杠杆长度变短 但是每次推动的角度更大 这产生一个更高的旋转速度和一个高速齿轮