SYMabbr.符号(=symbol)abbr.对称(=symmetry)Symphyta广腰亚目symplast共质体,合胞体symbiota共生生物区系symetronn.多管环形放大器Symphyla综合纲symphilia互惠群聚sympathinn.[生化]交感神经素；去甲肾上腺素Symplocosn.山矾属symmetria对称symptosis消瘦