难解难分，难分难解
nánjiě-nánfēn,nánfēn-nánjiě
〖beinextricablyinvolved〗∶形容争斗的双方实力相当,胜负未决,难分高下
〖besentimentallyattachedtoeachother〗∶也形容情意绵绵,情感深厚,难以分离