a hollow round pipe of metal; soft metal container for pastes, paints, etc.
electron tube; valve
"in Paris the subway system is called the `metro' and in London it is called the `tube' or the `underground'"
"inside Paris, they used to tube mail"
"We tubed down the river on a hot summer day"
The Mercury in the Tube fell down lower, about three inches.
出自： R. Boyle
He kicked aside cardboard tubes holding maps.
出自： H. Norman