Roughening helps alleviate this problem and ensures better traction .
粗糙有助于缓解这一问题，并确保更好的牵引力。
Surface roughening and growth mode transition of polycrystalline thin films .
多晶薄膜表面粗化与生长方式转变。
At the low point of a wave , more air touches the surface of the ocean , roughening the otherwise smooth water .
在波的最低点，较多的空气接触到海面，使原本平静的水面发生震荡。
Based on polymer surface modification and roughening method , the pp surface wettability against water was improved significantly . Film-forming ratio was increased from about 40 % to 95 % .
