夹层; 夹层铺料
Sandwich \Sand"wich\, v. t. [imp. & p. p. {Sandwiched}; p. pr. & vb. n. {Sandwiching}.] To make into a sandwich; also, figuratively, to insert between portions of something dissimilar; to form of alternate parts or things, or alternating layers of a different nature; to interlard.