doubleword双字doubleadj.双重的；成双的；两倍的v.翻一番；使 ... 加倍n.两倍；双份double mouldboard bottom双壁犁体double-line management双线管理double beam spectroscopy双线束光谱学double layer metal board双层板材double qualified teacher双师double beam illumination双束照明double loop power supply双路电源double-layer of lipoid脂质双层double-diode-pentoden.双二极－五极管double-transgenic mice双转基因小鼠