名词 doubleheader:

1. two games instead of one (especially in baseball when the same two teams play two games on the same day)

double PCR双重PCRdoubleadj.双重的；成双的；两倍的v.翻一番；使 ... 加倍n.两倍；双份double-direction thrust ball bearing双向推力球轴承Double jacketed graphite bonnet gasket双重封装石墨阀盖垫圈double-knitted open-meshed fabrics双面针织网眼织物double beam scanning spectrophotometer双光束扫描式分光光度计double-ended uterine secretion curet双头子宫分泌物刮匙double contrast examination of stomach胃双对比造影double faced interlock knitted fabrics复合双罗纹针织物double-frequency recording technique倍频记录技术double-squirrel cage induction motor[电] 双笼感应电动机double expansion compound steam engine两级膨胀复式蒸汽机