氢气 氫氣

    qīngqì

    1. Nounhydrogen (gas)

    科学家正在测试氢气的清洁燃烧效率。Kēxuéjiā zhèngzài cèshì qīngqì de qīngjié ránshāo xiàolǜ.Scientists are testing how efficiently hydrogen burns cleanly.