portable map board

例句：

1. 1. The portable mapboard is a great tool for outdoor exploration.
   便携式地图板是户外探险的好工具。
2. 2.The portable map board helped me navigate throughthe unfamiliar terrain.
   便携式地图板帮助我熟悉了不熟悉的地形。
3. 3. The portable map board was essential forour team's successful mapping project.
   便携式地图板对我们的团队成功的制图项目至关重要。