X字開(kāi)頭的單詞或詞組
xviX/Openxaserxanthiuriaxanthenonex bodiesxerophthalmiax-elementxanthodermX WindowX-particlexiphidinxanthocyanopsiax diseasexeonx-rays tubexylenol-salolX-ray diffractometerxerostomiaxi'anxerodermiaxenatex-legxanthophylxtx-ray beamxanthochromicxoanonxeromeniaxiphixerocheiliaxenogamyxantheinX-ray fluorescence spectrometryX-ray crystallographyx-ray paperxisxanthosine (X,Xao)X.25 protocolx-ray generatorX-ray photographxanthine bases



















