区别就是take part in是动词take+名词 part+介词 in短语，为及物性动词短语，而take part 为不及物性动词短语。具体的不同如下
take part in中文意思是参加，参与
Mrs. Kerr was too upset to take part in a reconstruction of her ordeal.
take part中文意思是参与，参加
The following have been chosen to take part: Watts， Hodges and Lennox.
