Related topics: Measurement
tim·ber·line /ˈtɪmbəlaɪn $ -ər-/ noun [singular] technical 1. TMHBPthe height above the level of the sea beyond which trees will not grow 林木线〔指树木能生长的最高海拔〕
2. TMHBPthe northern or southern limit in the world beyond which trees will not grow 树木生长线〔指南、北半球树木能生长的最高纬度〕