trace

n.踪迹，痕迹 vt.跟踪，追踪

town council, town crier, town hall, town house, town planning, town-folk, townee, townsfolk, `townspeople, township, townsman, toxaemia (also toxemia), toxic, toxicity, toxicologist, toxicology, toxin, toy, toy animal, Toyota, toyshop, trace element, traceable, tracer, tracery, trachea, tracheotomy, trachoma, tracing, tracing-paper, track, track and field, track down, track events, track out, track record, track suit, tracked, tracking station, tract, tractability,