headfirst [ˈhɛdˈfɚst]

例句:

• He lost his balance, and pitched out of the window headfirst.
  他失去平衡, 头朝下从窗子上跌了下去.
  
• My mate dived headfirst through a window and I ran down the hallway.
  我的同伴从窗口一头扎了下去，而我则沿着走廊跑。
  
• Dive: To plunge, especially headfirst into water.
  跳水: 潜入水中, 尤指头先下水的跳水.
  
• Instead, he prefers jumping in headfirst and asking questions later.
  来自BBC
• Once there, he presented the resident seals, Casey and Sabine, with four small fish sticking headfirst out of a plastic box.
  来自SA
• Starbucks was expanding rapidly, and Ms. Gelb was thrown headfirst into the business world.
  来自WSJ