bifsbiologically integrated farm system 生物综合农场系统Bin.[化]元素铋(bismuth)的符号bi-: pref.；表示“二；双”bire rs eye wood鸟眼纹材bifurcation gate分水闸门bifurcation duct分岔管道Bi-circulating双循环bipinnatipartite二回羽状深裂的bilater function双线性函数Bianconi's platebicyclic epoxide二环环氧化物bi - structure双层构造bicomponent flow两种流体