blend in/blend into something        
phrasal verb with blend verb [ I or T ] uk/blend/ us/blend/
 融入;混入
to look or seem the same as surrounding people or things and therefore not be easily noticeable
  We tried to blend into the crowd. 我们试图混入人群。 
 They have adopted local customs and tried to blend in with the community. 他们已经接受了当地习俗并努力融入当地社会。