track

n.足迹，踪迹；小径；铁轨 vt.跟踪

toxaemia (also toxemia), toxic, toxicity, toxicologist, toxicology, toxin, toy, toy animal, Toyota, toyshop, trace, trace element, traceable, tracer, tracery, trachea, tracheotomy, trachoma, tracing, tracing-paper, track and field, track down, track events, track out, track record, track suit, tracked, tracking station, tract, tractability, tractable, traction, traction-engine, tractor, tractor-trailer, trad, trade, trade gap, trade mark, trade name,