Among the common toxic gases are sulfur dioxide, methane, the oxides of nitrogen, ammonia, hydrogen sulfide, and hydrogen cyanide; and (most commonly) carbon monoxide.是什么意思_Among the common toxic gases are sulfur dioxide, methane, the oxides of nitrogen, ammonia, hydrogen sulfide, and hydrogen cyanide; and (most commonly) carbon monoxide.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句