gas duct的用法和樣例：
例句
- Steam generation from this hot flue gas is a last resort option.
從這種高溫煙道氣生產(chǎn)蒸汽是一種最后的選擇。 - Other pollutants, after all, are essentially impurities, which can be washed from the coal or filtered out of the flue gas.
畢竟那些可以從煤炭中或煙道氣體中濾除的其他污染物質(zhì)本身就是雜質(zhì)。
