Night soil from the 240 houses in Thiruneermalai is collected in a sump.Methane gas generated from the sludge is used to operate a generator.是什么意思_Night soil from the 240 houses in Thiruneermalai is collected in a sump.Methane gas generated from the sludge is used to operate a generator.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句