tie (something) in
phrasal verb with tie verb uk/taɪ/ us/taɪ/ tying | tied
（使）相一致；（使）有联系
When ideas or statements tie in, they agree or are closely connected, and if you tie them in, you make them agree or connect closely.
I can't tie in what he said today with what he told me last week. 他今天说的与上周他告诉我的根本就不是一回事。