lifeblood [ˈlaɪfˌblʌd]

例句:

• Coal and steel were the region's lifeblood.
  煤炭和钢铁曾是这个地区的生命线。
  
• Small businesses are the lifeblood of the economy.
  小型企业是经济的生命力所在。
  
• Tourism is the lifeblood of the city.
  旅游业是这座城市的命脉。
  
• The lifeblood of a restaurant is in the kitchen.
  来自VOA
• Ofcom recently published a research study Lifeblood Of Democracy?
  来自BBC
• Tourism was once the lifeblood of the economy.
  来自BBC