teaser

名词 teaser:

1. a worker who teases wool
2. someone given to teasing (as by mocking or stirring curiosity)
   同义词：tease, annoyer, vexer
3. an advertisement that offers something free in order to arouse customers' interest
4. a particularly baffling problem that is said to have a correct solution
   同义词：puzzle, puzzler, mystifier
5. an attention-getting opening presented at the start of a television show
6. a flat at each side of the stage to prevent the audience from seeing into the wings
   同义词：tormenter, tormentor
7. a device for teasing wool

1. This one's a real teaser.
   这可真是个难题。