追踪着某人, 掌握着某人行为的线索, 掌握着某人企图的线索

on the track

germ line(Weismann 1865)germ track

endless TRACK(S) for exercising athletes

back tracking algorithm【计】;back-track algorithm【计】

sound track on photo carrier

crosstalk【计】;inter track crosstalk【计】;interchannel crosstalk【通信】

fast-track procedure

metal track【车辆】