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stress & pressure 用法区别?

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stress & pressure 用法区别?
差别不大
  stress:
  pressure or tension exerted on a material object
  压力,重压
  the distribution of stress is uniform across the bar.
  杆上压力分布是均衡的.
  ■the degree of this measured in units of force per unit area
  压强
  
a state of mental or emotional strain or tension resulting
from adverse or very demanding circumstances
  精神压力,紧张
  he's obviously under a lot of stress.
  显然,他的压力非常大.
  pressure
  the continuous physical force exerted on or against an object by something
in contact with it
  压力;压迫
  the slight extra pressure he applied to her hand.
  他往她手上微微多加的压力.
  ■[count noun]the force per unit area exerted by a fluid against a surface
with which it is in contact
  压力;压强
  gas can be fed to the turbines at a pressure of around 250 psi.
  燃气可以约每平方英寸250磅的压强注入燃汽缸.
  
the use of persuasion, influence, or intimidation to make
someone do something
  (经劝说、影响或胁迫施加的)压力
  back-benchers put pressure on the government to provide safeguards.
  普通议员向政府施压以提供保障措施.
  [count noun]the many pressures on girls to worry about their looks.
  让女孩担心长相的诸多压力.
  ■the influence or effect of someone or something
  影响;影响力
  oil prices came under some downwards pressure.
  油价面临下跌的压力.
  ■the feeling of stressful urgency caused by the necessity of doing or
achieving something, especially with limited time
  压迫感
  he resigned due to pressure of work.
  他由于工作压力而辞职.