1.The reason is that the theory of enterprise unionization has not been deeply expounded and that unionized enterprise lacks systematic study on the scientific operation of unions.
究其原因，是企业联盟的理论尚未得到深入的阐释，结盟企业缺少对联盟科学运作的系统研究。
2.The reason is that the theory of enterprise unionization has not been deeply expounded and that unionized enterprise lacks systematic study on the scientific operation of unions.