单词：bubble_up 

动词

• 
  [1.v.bubble_up] (同义词:[bubble_up(v.冒泡, 沸腾 )]  [intumesce( vi. (因受热等)膨胀, 肿大, 隆起, 沸腾 )]  )
• 
  注释列句：move upwards in bubbles, as from the effect of heating; also used metaphorically; "Gases bubbled up from the earth"; "Marx's ideas have bubbled up in many places in Latin America"
• 上位词 -> [surface( n. 表面, 外表, 水面 adj. 表面的, 肤浅的 )]  [ascend( v. 攀登, 上升 )]  [travel( v. 旅行, 传播 vi. 行进, 传播 n. 旅行 )]