XOR=Exclusive OR “异” 或(逻辑运算)XXs或 X's,X级电影, 成人电影(十八岁以下儿童不得观看)x-bill of material多材料清单X-ray cardiographyX(射)线心动描记器Xylose mother liquor木糖母液XBSW crossbar switch纵横接线xyluketose phosphate磷酸木酮糖xylooligosaccharides低聚木糖xylooligosaccharieds低聚木糖Xylocoris mongolicusn.蒙古仓花蝽Xylocopa s. str.n.木蜂亚属X ray out of plaster去石膏X(射)线检查