n. the act of smoothing
v. make smooth or smoother, as if by rubbing
v. free from obstructions
a. having a surface free from roughness or bumps or ridges or irregularities
a. 平滑的, 平稳的, 流畅的, 和蔼的, 安祥的, 圆滑的, 调匀的, 无毛的
vt. 使光滑, 烫平, 使平和, 消除
vi. 变平滑, 变平静
n. 一块平地, 平滑部分