A track is a piece of ground, often oval-shaped, that is used for races involving running, cars, bicycles, horses, or dogs called greyhounds.
跑道 ...the athletics track.
If you track animals or people, you try to follow them by looking for the signs that they have left behind, for example, the marks left by their feet.
跟踪 He thought he had better track this wolf and see where it lived. 他认为他最好跟踪这只狼,并看看它在哪儿生活。