或

• He is always investigating or doing something .
  他永远在探索或做一些事情。
• Shooting and trapping are expensive .
  射杀或诱捕的代价是高的。
• Gold is more expensive to hold or to ship .
  持有或运送黄金，费用都比较大。
• They had at least one source or input node .
  它们至少有一个发点或输入节点。
• T=kb is the transmissibility, or transmissivity .
  TKb是可导水性或导水性。
• It does n't matter to me whether you go or not .
  你去或不去，对我都没关系。
• The pot calls the kettle black .
  只知责怪别人而不知自己有同样的缺点或过失。
• They have no recreation or recess in their work .
  他们并没有休息或停工时间。
• Hitler had failed to quell or conquer britain .
  希特勒未能打败或征服不列颠。