短语词组短语mustard -gas cloud 芥子气云distilled mustard gas 蒸馏芥子气;蒸馏芥子气英语mustard gas keratitis 芥子气角膜炎Nitrogen mustard gas 盐酸氮芥;氮芥子气mustard gas safety clothing 芥子气保安衣mustard gas resistance 抗芥子气mustard gas K 芥子气 返回 mustard gas