单词：labor-intensive 

形容词

• 
  [1.a.labor-intensive] (同义词:[labor-intensive]  [labour-intensive]  )
• 
  注释列句：requiring a large expenditure of labor but not much capital; "cottage industries are labor intensive"
• 近义词 -> [effortful( adj. 显示努力的,充满努力的,需要努力的 )]