"Translation-Dictionary.net" is the most comprehensive free online dictionary available on the web. It well exceeds regular dictioanries in terms of vocabulary coverage and it translates hundreds of thousands of words, phrases, and sentences between multiple languages. It includes translations for a wide varierty of domains such as proper names, technical terminologies, movie titles, etc. It also offers pronunciation, related terms, synonyms, spelling correction, and example sentences.

双子电刷 double split brush

双孔 diplopore

双孔定向耦合器 two-hole directional coupler

双孔构架 spectacle frame

双孔磁心 double-aperture core

双孔线圈 binocular coil

双孔花药 biporose anther

双孔透镜 double-aperture lens

双孔钻杆 dual-bore drill rod

双字 double word

双字母 biliteral

双字节 double byte

双字长累加 double-length accumulation

双字长运算 double-precision arithmetic

双季栽培制 double-crop system

双季稻 double-cropping paddy

双学位 double degree

双室炉 double chamber furnace

双室船闸 twin lock

双室调压室 double-chamber surge chamber

双宫丝 doupioni

双宫绸 doupioni

双宫茧 dupion

双宫茧丝 dupion

双宫茧缫丝 doupion reeling

双宾语 double-objects

双宿双飞 always keep each other's com...

双寄存器 pair register

双对偶 double dual

双对称 disymmetry

双对称色散 disymmetric dispersion

双对称面 disymmetric face

双导线 two-conductor line

双射 bijection

双射望远镜 catadioptric telescope

双射电源 double radio source

双尖镐 tubber

双层 double-deck

双层中空玻璃 double layer glass

双层公共汽车 double-deck bus

双层壁 cavity wall

双层客车 double decker coach

双层床 bunk bed

双层桥 double level bridge

双层火车 double-decker

双层玻璃 double-glazing

双层玻璃窗 double window

双层甲板船 two-decker

双层窗 a double window

双层胶合板 two-ply

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