pull back (from something) 
phrasal verb with pull verb uk/pʊl/ us/pʊl/
  mainly US      
 改变主意;退却;退出
to decide not to do or involve yourself with something when you were previously going to
  The news is that the company intends to pull back from petrochemicals. 据传闻,该公司想撤销石化产品项目。