woebegone       
adjective  literary uk/ˈwəʊ.bɪ.ɡɒn/ us/ˈwoʊ.bɪ.ɡɑːn/
 忧伤的;悲伤的
looking very sad
  When he wants to go for a walk, the dog sits by the door with a woebegone expression. 当他想出去散散步时,那条狗愁眉苦脸地坐在门边。 
 There's no need to look so woebegone - we can get it fixed. 别那么愁眉苦脸的——我们能解决。