cross-fertilization
noun [ U ] (UK usually cross-fertilisation) uk/ˌkrɒs.fɜː.tɪ.laɪˈzeɪ.ʃən/ us/ˌkrɑːs.fɝː.t̬ə.ləˈzeɪ.ʃən/
（思想、风俗等方面）相互得益的交流，互相的影响
the mixing of the ideas, customs, etc. of different places or groups of people, to produce a better result