biyu比喻Bin.[化]元素铋(bismuth)的符号bi-: pref.；表示“二；双”bicarbonate of soda小苏打biplanar image tube双平面显像管biharmonic equation双调和方程,双低方程bipropellant rocket二元燃料火箭发动机bicyclic trisulfone二环三砜bimaxillary trusion[医] 双颌牙错位biparental organisms双亲生物bimetallic electrode双金属电极bifilar galvanometer双线检流计biphase shift keying二相移相键控