obstructions [əbst'rʌkʃnz]

例句:

• If all the coronary arteries are free of significant obstructions, all parts of the heart will receive equal amounts of oxygen.
  如果所有的冠状动脉均没有较大的阻塞物，心脏各部分将得到等量的氧气。
  
• The absence of obstructions is of course an idealization.
  没有障碍物的情况当然是一种理想化的情况.
  
• These obstructions could take some weeks to clear from these canals.
  这些障碍物可能要花几周时间才能从运河中清除掉.
  
• Senses are geared to perceive obstructions to reality and not reality itself.
  来自SA
• "It helps to get over any obstructions and in," he said.
  来自VOA
• She believes the space needed to start up and the expenses involved can still be insurmountable obstructions.
  来自BBC