The light is in the tunnel, not at the end of the tunnelThe light is in the tunnel, not at the end of the tunnel
Science experiments test tube knowledge discovery desktop wallpaperScience experiments test tube knowledge discovery desktop wallpaper
Black and white railway street in it to go to the cityBlack and white railway street in it to go to the city
A long, hollow cylinder of metal, plastic, glass, etc., for holding or transporting something, chiefly liquids or gases. A thing in the form of or resembling a tube, in particular. The subway system in London. A sealed container, typically of glass and either evacuated or filled with gas, containing two electrodes between which an electric current can be made to flow. Provide with a tube or tubes. Fit (a person or animal) with a tube to assist breathing, especially after a laryngotomy.