tramp material

例句：

1. 1. The hikers used the trumpet to signal their presence in the wilderness.
   登山者用喇叭在荒野中发出信号。
2. 2. The camper had gathered all the necessary camping equipment before setting out.
   露营者出发前已经收集了所有必要的露营设备。
3. 3. The backpacker carried only essentials and avoided bringing unnecessary items on the trip.
   背包客只携带必需品，避免在旅途中携带不必要的物品。