rate-of-climb indicator

例句：

1. 1. The climber used a special device to measure the rate of his ascent.
   攀岩者使用一种特殊的装置来测量他的上升速率。
2. 2. The mountain guide provided an accurate rate-of-climb indicator for the group.
   山地导游为团队提供了准确的爬升率指示器。
3. 3.The hikers followed the trail closely, ensuring they stayed within the recommended rate of climbing.
   徒步旅行者紧随路线，确保他们保持在推荐的爬升速率内。