for hours

• When he ' s depressed he sits brooding for hours
  他消沉的时候,就坐著沉思几小时
• He fiddled around with the engine for hours
  他胡乱摆弄那台发动机达数小时之久。
• Yeah . she had me going up and down for hours
  是的,她让我来来回回的开了几个小时
• I often fish for hours without catching anything
  我经常一钓数小时却一无所获，
• He can drone on for hours about his pet subjects
  他能就他的宠物侃侃而谈几小时。
• . . . so that it stays cold for hours without a freezer
  它能在冰箱外几小时都不溶化
• Work facinates me . i can look at it for hours
  工作好有意思耶，尤其是看别人工作。
• . . . so that it stays coid for hours without a freezer
  它能在冰箱外几小时都不溶化
• He waffled on for hours but no one was listening
  他絮叨了半天，谁也没听进去。
• The accident tied up the traffic for hours
  那个事故使交通动弹不得好几个小时。