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roughen是什么意思

roughen

美['rʌfn]  英['rʌfn]
v.  弄粗弄崎岖不平
  过去式:roughened  过去分词:roughened  现在分词:roughening  第三人称单数:roughens
  近义词:coarsen,toughen,scratch,abrade,rough,crumple,smooth,

英英释义

Verb
  1. make rough or rougher;

    "roughen the surfaces so they will stick to each other"

例句

  1. Roughen the surface before applying the paint.先把表面弄毛糙再涂颜料。
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