X字开头的单词或词组
xeroticxylylene amineX/Openxerophthalmiaxylitexenylxaserxi'anxanthiuriax bodiesxanthenoneX Windowx-elementxanthodermx-rays tubexerodermiaxanthophylxylenol-salolX-particlexanthocyanopsiaxenogamyxerostomiaxiphidinX-ray diffractometerx-legxanthosine (X,Xao)x diseaseX-ray fluorescence spectrometryxenatex-ray beamxanaduxoanonxanthochromicxantheinxerocheiliaxeromeniaxiphiX-ray crystallographyx-ray paperx-ray generatorX.25 protocolxeroderma
