trail

中文： 足迹、踪迹、痕迹、路径

1. The track or indication marking the route followed by something that has passed, such as the footprints of animal on land or the contrail of an airplane in the sky. · The trail has gone cold.· condensation trail
2. A route for travel over land, especially a narrow, unpaved pathway for use by hikers, horseback riders, etc.
3. A route or circuit generally. · Politicians are on the campaign trail in preparation for this year's election.
4. A trailer broadcast on television for a forthcoming film or programme.
5. A walk in which all the edges are distinct.
6. The horizontal distance from where the wheel touches the ground to where the steering axis intersects the ground.

复数 trails