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 trouble for typhoon forecasters台风预报员的双重麻烦double-walled cryogenic storage tank双壁深冷储罐double trapezoidal recursive algorithm双梯形递推算法Double ring for ear-shaped traveller合纱机用金属环Double ring-shaped Coulomb potential双环形Coulomb势Double curved surface of transposition变位复曲面double-column planer milling machine双柱龙门铣床double metal cyanide complex catalysts双金属氰化物催化剂double wishbone torsion bar suspension双横臂扭杆悬絮double-bond positional isomerization双键位置异构