impermeable [ɪmˈpɜ:rmiəbl]

例句:

• In between there are several layers of impermeable rock.
  来自THETIMES
• Thus clays and shales tend to be impermeable.
  因此粘土和页岩就往往不透水.
  
• The canoe is made from an impermeable wood.
  独木舟由防水木头制成。
  
• The external layer of the skin is relatively impermeable to water.
  皮肤的外层不透水.
  
• It is precisely these types of impermeable barriers that stop fracs cold.
  来自SA
• Outside, there was only the desert huge, an impermeable membrane.
  来自NEWYORKER