trestletree

例句：

1. 1. The tallest tree in the forest is a trestletree.
   森林中最高的树是一棵扶梯树。
2. 2. The trestletree provided shade and shelter for the travelers.
   这棵扶梯树为旅行者提供了阴凉和庇护。
3. 3. The trestletree was used to transport goods up and down the mountain.
   这棵扶梯树被用来运输货物上下山。