【电】 a-c positioning
interchange; alternating; communion; exchange; intercommunion; intercourse
【计】 AC
【化】 a-c; A.C.; ac; alternate current(ac,A.C.); alternating curren
alternating current
【经】 intercourse; interflow; swap
book; order; decide; fix; stable; surely; calm
again; double; times
【机】 double