单词：downcome
音标：['dajnkʌm] ；
n. 下降, 衰落
n. Sudden fall; downfall; overthrow.
n. A pipe for leading combustible gases downward from the
top of the blast furnace to the hot-blast stoves, boilers, etc., where
they are burned.
n. A pipe for leading combustible gases downward from the
top of the blast furnace to the hot-blast stoves, boilers, etc., where
they are burned.