柯林斯词典tuba /ˈtjuːbə/ (tubas) 1. N-VAR A tuba is a large musical instrument of the brass family which produces very low notes. It consists of a long metal tube folded around several times with a wide opening at the end. 大号[oft 'the' N] 返回 tuba剑桥词典a brass musical instrument consisting of a long , bent metal tube that the player blows into, producing low notes 大号（一种低音铜管乐器） 返回 tuba