来自《耶鲁大学开放课程：金融市场 第22集 第22集》

• 
  
  there's a lag.
  而开采需要时间
• 
  
  So, we have to consider oil that's above ground
  因此我们说的是在地上的
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  and ready to go.
  能够直接用来交易的油
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  It is stored and it's stored here in New Haven.
  储存起来的 储存在纽黑文的原油
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  In fact, the Government of the United Stated
  事实上 美国政府
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  has created what they call a "Strategic petroleum reserve."
  成立了一个战略石油储备
• 
  
  It has taken oil and it's storing it in caverns, in caves,
  这项储备即是将原油储存在洞穴中
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  and this is in case of a national emergency
  以防未来突发的
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  where we suddenly really need oil.
  全国性油荒
• 
  
  That isn't going to affect this market
  但这不会影响原油市场
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  because it's being held by the Government
  因为这是政府应对战争
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  for some war or some terrible event.
  或是恐怖事件的石油储备