X字開頭的單詞或詞組
xanthateX particlexystxiphoidx-ray cameraxylotomyxenophilexanthenexanthininXenopus laevisxysmaxanthophyllX-ray pictureXENIXxylylxylophonistx-kneeX directionxenic acidxenodiagnosisxanthicxanthomatosisxanthomaxylomaxerophagyxmitterxanthotoxinX zonexanthatinxerographyxanthinexerogelxyloidxibornolx feverxiphoid processxerosisX-ray diffractionxanchromaticxylenolxanthodermaXON/XOFF