音标:['rʌfәniŋ] ;
粗加工, 粗糙法
v make rough or rougher
词型变化:名词复数形式 : roughenings

roughening的用法和样例:

例句

  1. Before painting the wood, roughen the surface with sandpaper.油漆木器前,先用砂低把表面磨毛糙。
  2. Roughen the surface before applying the paint.先把表面弄毛糙再涂颜料。
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hypertension of pregnancy
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