sandwich something together
phrasal verb with sandwich verb uk/ˈsæn.wɪdʒ/ us/ˈsæn.wɪtʃ/
把…结合（或粘）在一起
to put a layer of something between two things that sticks them together
I sandwiched the cakes together with chocolate butter cream. 我在蛋糕之间涂上了一层巧克力奶油。