氮气

In sentences Pinyin

我们wǒ men呼吸hū xī的de空气kōng qì是shì由yóu氧气yǎng qì和hé氮气dàn qì组成zǔ chéng的de。我們wǒ men呼吸hū xī的de空氣kōng qì是shì由yóu氧氣yǎng qì和hé氮氣dàn qì組成zǔ chéng的de。The air we breathe consists of oxygen and nitrogen. #9409466