pustules

例句:

• The oil suppurates the pustules.
  油能催熟这些小脓包.
  
• When this happens, pustules form.
  在这种情况下, 脓疱形式.
  
• Its most devastating form ( Puccinia graminis ) attacks the plant's stem, forming lethal, scaly red pustules.
  其最为严重的破坏方式 ( 小麦锈菌 ) 是袭击植物的茎, 形成导致植株死亡的鳞片状红色脓疱.
  
• Small white and yellow pimples may appear, which sometimes become pustules.
  来自BBC