单词：first_cause 

名词

• 
  [1.n.first_cause] (同义词:[first_cause(原动力  主要原因 )]  [prime_mover(n.原动力, 发动者 )]  [primum_mobile( 原动天, 第十层天(2世纪希腊天文学家托勒密(Ptolemy)的天动说中的最外层天体, 带动所有天体转动) )]  )
• 
  注释列句：an agent that is the cause of all things but does not itself have a cause; "God is the first cause"
• 上位词 -> [causal_agent]  [physical_entity]  [entity( n. 实体 )]