常見例句雙語例句By analyzing the relationship between speed loss, speed discount in different gradient and grade length, the paper also brings forward the maximum longitudinal gradient and grade length limit.通過速度折減量與坡長之間的關系曲線，提出基于運行速度差和滿足公路服務水平要求的各級公路最大縱坡坡度與坡長限制值。 返回 maximum longitudinal gradient