The Double Helix-A P双螺旋
double-ended a er双头扳子
A double-a deputy一双一副
Double AIR Hide-A-Bed双人沙发床
some saying N double-A-C-P传言是全国有色人种协会所为
double-cone ante a双锥形天线
double a-particle tracks双a
intermittent double A-V junctional rhythm室交接处节律
double a-v junctional escape rhythm双重房室交接处逸搏节律