X字開頭的單詞或詞組
xylene tetrachloridexylene trichloridexylenesulfonatexylylenediaminexyloascorbic acidxylosidexanthoplastyxerophthalmia superficialisxixxixanthine nucleotidexanthylic-nucleic acidxiphodidymusxanthoxyli fructusxxixylene disulfonic acidxanthoproteie acidxanthopterinexeroprintingxenxonxvixaxcxisxxiixchromosomexerusxmmxanaduxivxiiixiphiasxmaxiexinhua/news/agencyxemex-linkedxorxmlxylenesulfonic acidx-linked recessive