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]
The Tu-144 flew just55passenger flights, and the Boeingdidn'treach theprototypephase — so we were right about the Concorde, which flew for BAandAir Franceuntil 2003.