unrewarding [ˌʌnrɪˈwɔ:rdɪŋ]

例句:

• Listening to it in its entirety is also fairly unrewarding.
  把它完整地听下来后还是没多少收获。
  
• Sometimes the work can feel unrewarding and everlasting.
  有时候，那个工作让人觉得没有成就、永无止境。
  
• Such parts are often considered to be thankless, unrewarding.
  这种角色通常被认为是吃力不讨好的.
  
• That would be a throwback to an unrewarding past.
  来自WSJ
• That's because their jobs are unrewarding, either emotionally or financially or both.
  来自THETIMES
• It must be very lonely and unrewarding to be seen as a gullible fool by the rest of the world.
  来自SA