Curve and path resistance are great, linear resistance is little, declivous path still has quicken force.曲线及上坡道阻力大, 直线阻力小, 下坡道还有加速力....

declivous的音标：declivous的英式发音音标为：[dɪ'klaɪvəs]declivous的美式发音音标为：[dɪ'klaɪvəs]...

adj.下坡的，向下倾斜的...