石墨气冷堆 shímòqìlěngduī gas-graphite reactor Origin Definitions Defs Strokes Stroke Words Sentences Sents 石墨 shímò graphite graphite; a soft black form of carbon used in pencils and as an electrical conductor气 氣 qì noun gas gas; air; the state of matter that is neither liquid nor solid冷 lěng verb to cool to let something hot cool down堆 duī noun pile a heap or stack of things