tube: [17] The ultimate origins of tube are unclear. It comes, probably via French tube, from Latin tubus ‘tube’. This was closely related to tuba ‘war trumpet’, source of English tuba [19], but what their joint ancestor might be is not known. => tuba
tube (n.)
1610s, from Middle French tube (15c.), from Latin tubus "tube, pipe," of unknown origin. The London subway was christened the Twopenny Tube (H.D. Browne, in the "Londoner" of June 30, 1900) before it even opened; tube for "cylindrical railway tunnel" is attested from 1847. The meaning "TV as a medium" is from 1959, short for cathode ray tube or picture tube. Tube top as a women's clothing style is attested from 1972. Tube steak is attested from 1963 as "frankfurter," slang meaning "penis" is recorded by mid-1980s.
权威例句
1. The only baseball he saw was on the tube.
他看过的唯一一场棒球赛是在电视上看的。
2. The secondary current sets up a magnetic field inside the tube.
二次电流在管子内部会产生磁场。
3. That's Warwick Road, just opposite Earls Court tube station.
那是沃里克路,就在伯爵宫地铁站对面。
4. He prefers travelling on the Tube to riding in a limousine.
他更愿意乘地铁出行,不愿坐豪华轿车。
5. I took the tube then the train and came straight here.