They leave long trails behind them, tracks you might say as they move from one point to another.
它们身后留下了一条长长的痕迹，你也许可以说这是它们从一个位置移动到另一个位置的轨迹。
2
Stonebridge is one of the shorter tracks, but very steep as it takes you up to the waterfall and you do need to be in good condition to manage it.
石桥是较短的路线之一，但是非常陡峭，因为它将带您直达瀑布，而且您确实需要在良好状态下才能应对。
3
To avoid hurting the thousands of crested ibises that fly near one part of the railway, protective nets have been set up along the tracks to make sure the birds will not fly into a train.