duplex
a 二重的；二倍的(du+plex重叠→二重的）
释义2：
duplex
/ 5dju:pleks /
◙ noun1. 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◙ adjective1. 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2. (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】
1. mid 16th cent. (as an adjective): from Latin duplex, duplic-, from duo 'two' + plicare 'to fold'. The noun dates from the 1920s
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