二苯基：diphenyl
二苯膦：diphenyl phosphine
二苯硒：diphenyl selenide
二苯锡：diphenyl tin
二苯锌：zinc diphenyl
二蓖精：diricinoleidine
二苄砜：benzyl sulfone,dibenzyl sulfone
二苄汞：mercury dibenzyl
二苄基：dibenzyl
二丙砜：dipropyl sulfone
二伯的：di-primary
二舱制：two-compartment subdivision
二层搁：mezzanine between 1st and 2nd floor
二层台：forble board ,fourble board,monkey-board,racking platform,Runaround
二岔肢：biramous appendage
二产妇：bipara,secondipara
二场制：two-yard system
二次簇：secondary cluster
二次群：Secondary group
二次色：secondary colours
二次字：second word
二醋精：glycerin diacetate,diacetin
二代盐：dibasic salt
二氮烷：diazane
二氮烯：diazene
二道板：second detent
二道筛：secondary screen
二等票：second-class ticket
二等品：seconds;second grade
二底图：reproduction of original; copy of original
二地址：double-address; two-address
二地主：mesne landlord,sublessor
二丁砜：dibutyl sulfone
二丁基：dibutyl
二丁精：dibutyrin
二丁硫：dibutyl sulfide
二丁脲：dibutyl urea
二丁酸：dibutene
二丁锌：zinc dibutyl
二度的：two dimensional
二恶嗪：dioxazine
二恶唑：dioxazole
二房东：subleasor
二分的：dimidiate
二分点：equinox,equinoctial points
二分圈：equinoctial colure
二分时：equinoctial time
二分岩：diaschist(ic) rocks
二氟醚：difluoro ether
二氟酯：difluoro ester