tube/ tjuːb /

1.noun [c] 
(pipe) 管子

2.noun [c] 
(container) 筒

3.noun [BRIT] 
the tube (underground) 地铁[美 = subway] 
4.noun [US] [inf] 
the tube (television) 电视[英 = the box] 
to travel by tube
乘地铁