idler

• Idle industries have cast workers into unemployment .
  萧条的工业使工人失业。
• This is far from an idle suggestion .
  这决不是无用的提议。
• I had thought his words idle .
  我总认为他这话是随口说的。
• Even then he was never idle .
  就在那时，他也没虚度年华。
• These aren't idle questions .
  这是些并非随便问问的问题。
• He is conscientious and diligent , and is never idle .
  他是个勤谨人，整天闲不住。
• She may be idle for aught i know .
  她或许闲着也说不定。
• It was no idle warning but a stern threat .
  这不是虚声恫吓的警告，而是严肃的威胁。
• Human ingenuity never idles .
  人类智能永远不会闲置的。
• Idle folks have the least leisure .
  懒惰的人最没空闲。