加氢 jiāqīng hydrogenation / hydrogenate Definitions Defs Origin Strokes Stroke Words Sentences Sents 加 jiā verb to add to add; to put in; to append; to place something on top of another; to perform addition in mathematics氢 氫 qīng noun hydrogen the chemical element hydrogen, a colorless, odorless, and tasteless gas that is the lightest of all known substances; usually referred to as 氢气 qīngqì
