doublenessn.二倍诡计doubleadj.双重的；成双的；两倍的v.翻一番；使 ... 加倍n.两倍；双份double mechanical end face seal双端面密封double-quick accessing method快速读取方法double antibody sandwich method双抗体夹心法double coincidence spectrometer双符合谱仪double chateau briand bearnaise铁扒牛柳double-frequency transmission双频率传输double feedback external cavity双反馈外腔double-ended amputating knife双头截肢刀double-loop control structure双回路控制结构double-asymmetry of the Earth地球双重不对称性