gutter  
 noun uk/ˈɡʌt.ər/ us/ˈɡʌt̬.ɚ/
  (CHANNEL)       
  [ C ](道路边的)排水沟,街沟 
the edge of a road where rain flows away
  [ C ](屋檐的)雨水槽,檐槽,天沟 
an open pipe, usually at the lower edge of a roof, that collects and carries away rain
   (SOCIAL LEVEL)     
the gutter[ S ] (尤指社会的)最底层,贫民窟
the lowest level, especially of society
  Born to a poverty-stricken family, she dragged herself out of the gutter to become a successful business owner. 她出生在一个极度贫困的家庭,但是她从社会最底层奋力挣扎出来,成功地拥有了自己的公司。 
 gutter       
verb [ I ]  literary uk/ˈɡʌt.ər/ us/ˈɡʌt̬.ɚ/
 (火焰或蜡烛,尤指在熄灭前)忽明忽暗,摇曳不定
(of a flame or candle) to burn unevenly and weakly, especially before completely stopping burning
  a guttering candle 摇曳不定的烛光