X字开头的单词或词组
x-rays tubeX-ray diffractometerxanthelasmax-ray beamx-ray paperxeromeniaxanthodermX-ray photographxanthine basesxerophthalmiaxiphix-ray generatorxenomeniaxerocotyX-ray diffraction analysisX.25 protocolxerocheiliaxenbucinxyloniteX-ray fluorescence anaiysisx-waveX-ray crystallographyx-ray shortxenogamyximenynic acidX-ray testxylocarpousxiphisternal jointsxysterxy plotterxerophobiaxerodermaticxanthochromiaX.25xenogeneticx-ray spectroscopyxylanasexanthocytexeroderma pigmentosumxerotic keratitisxylonamideX-ray peak broadening