Xavi哈维；西班牙足球运动员；司职中场XA=Auxiliary Amplifier 辅助放大器Xanthomonas oryzae pv.Oryzae白叶枯病Xathomonas oryzae pv. oryzae水稻白叶枯病菌xanthochromia striata palmaris掌纹黄变(症)xanthochromia striatum palmaris掌纹黄色症Xanthoceras serrborifolia bunge文冠果Xanthomonas orvzae pv. oryzae水稻白叶枯病菌XAFH X-band antenna feed horn波段天线馈电喇叭Xanthium strumatiumnon non L.苍耳Xanthophytum attopvensis Pierre匙萼木Xanthomonas oryzae pv. oryzae白叶枯病菌