固氮 Save Sign in to save words gùdàn ㄍㄨˋ ㄉㄢˋ nitrogen fixation Character by character 固(gù)hard 氮(dàn)nitrogen Other words read gùdàn gudan with other tones 孤单 孤胆 Other words read gùdàn gudan with other tones 孤單 孤膽 A Chinese word or character, or English Search Sources CC-CEDICT, CC BY-SA 4.0 pinyinjs, Apache-2.0