adj.平稳的( smooth的最高级 )；光滑的；磨平的；（言谈）流利的 双语释义：adj.(形容词)光滑的,平坦的,平静的 having an even surface without points, lumps, bumps, etc.; not rough平稳的,不颠簸的,不摇晃的 moving evenly , without bumps, jolts, stops, etc. or even in movement without sudden changes or breaks顺利的,没有困