Bixo比克索Bin.[化]元素铋(bismuth)的符号bi-: pref.；表示“二；双”bimodal tomograph双态体层摄影机biradial symmetry两侧辐射对称,双辐对称bilinear operator双线性运算符bivelangiocarpous双菌幕发育型bimetallic system双金属体系bipartite matroid二部拟阵Birefringent Axes偏振轴bipotential stage双潜能期bifurcation value分歧值biphasic toxicity二相毒性