Symmsn.西姆斯SYMabbr.符号(=symbol)abbr.对称(=symmetry)symplectic system of elasticity弹性力学辛体系Symphysiotomy to assist delivery耻骨连合切开术助产symphalangism-surdity syndrome指(趾)关节粘连与耳聋综合征symmetries and conservation laws对称性和守恒律sympetrum striolatum charpentier条斑赤蜻sympathomimetic amine stimulants拟交感胺类兴奋剂symmertrical arcs of pattern arc花样对称衍射线symboic parameter standard value符号参数标准值symbiotic nitrogen fixation rates共生固氮率Symphysiolysis of symphysis pubis耻骨联合分离