something having two parts, in particular 成对物,成双物,双重物,尤指 ■a flat on two floors 复式公寓,占两层楼的公寓套房 ■(N. Amer.)a residential building divided into two apartments (北美)联式房屋,分为两套公寓的住房 ■(chiefly N. Amer. & Austral.)a semi-detached house (主 北美,澳)半独立式房屋 ■(Biochemistry)a double-stranded polynucleotide molecule (生化)双股多(聚)核苷酸分子
adjective
having two parts, in particular 双的,双重的,尤指 (of a flat or room) on two floors. (公寓或房间)复式的,占两层楼的。 ■(chiefly N. Amer. & Austral.)(of a house) semi-detached (主 北美,澳)(房屋)半独立式的 ■(of paper or board) having two differently coloured layers or sides (纸,卡板纸)双层的,双面的 ■(Biochemistry)consisting of two polynucleotide strands linked side by side (生化)双链体,双螺旋,双股多(聚)核苷酸的 ■(of a printer or its software) capable of printing on both sides of the paper (打印机或其软件)可双面打印的
(of a communications system, computer circuit, etc.) allowing the transmission of two signals simultaneously in opposite directions (通信系统或计算机电路等)允许两个信号同时反方向传送的
语源
mid 16th cent. (as an adjective): from Latin duplex, duplic-, from duo 'two' + plicare 'to fold'. The noun dates from the 1920s