Syren.赛尔SYabbr.平方码(=square yard)abbr.主发动机偏转(=sustainer yaw)syphiloderma papulosum丘疹性梅毒疹systolic gallop rhythm收缩期奔马律syringoencephalomyelia脑脊髓空洞症sythetic hydroxyl mica合成羟基云母systolic communication脉动通信Syzygium myrsinifoliumn.竹叶蒲桃syllabric articulation音节清晰度syph-ilitic aortitis梅毒性主动脉炎systolic upstroke time收缩期向上搏动时间systerm transformation体制转型