cavities

例句:

• Naturally, they nest in cavities in large trees.
  来自BBC
• Cavities in teeth are caused by decay.
  牙齿上的空洞是由龋蚀造成的.
  
• The dentist filled several cavities in my teeth.
  牙医给我的牙堵了好几个洞 excavation 指“挖掘的洞”,如:
  
• Numerous and extensive eddy cavities retard the turbulent mixing process.
  多而大的涡流区延迟了扰动的混合过程.
  
• "It was even ringing my cavities," he says.
  来自WSJ
• Basically I do it to prevent cavities, he told me.
  来自NEWYORKER