engines

例句:

• More and more machines were powered by steam engines.
  来自BBC
• I heard the engines revving as the lorries backed and turned.
  卡车倒车和掉头的时候，我听见发动机的轰鸣声。
  
• The colonel ordered, "I want two good engines down here asap."
  上校命令道：“尽快给我找两台性能好的发动机来。”
  
• The helicopter crash landed when one of its two engines cut out.
  直升机的两个发动机中有一个停止运转，只好迫降了。
  
• Perhaps entire books written with search engines in mind.
  来自WSJ
• Those terrible engines of war will wait until then.
  来自NEWYORKER