teaser [ˈtizɚ]

例句:

• The problem looks simple enough, but when you come to try and solve it you'll find it's a real teaser.
  这道题看起来很简单, 但当你要解它时你就会发现它确实是一道难题.
  
• It doesn't pay to invite a teaser like that.
  犯不上招引那样的头痛的事儿.
  
• Whether to accept the offer was a teaser.
  是否接受那项提议还是个难题.
  
• Yesterday's video was the most revealing teaser yet.
  来自THETIMES
• The teaser only gets pay-off if you react.
  来自Fast Forward
• Nothing irks me more than teaser articles.
  来自SA