timber line

• 树木线，指山上或极地地区因低温、土壤缺乏或强风而无法生长树木的海拔高度或界限。

The line or elevation on a mountain or in polar regions above which trees cannot grow due to cold temperatures, lack of soil, or harsh winds.

1. Tree growth boundaryC1formal

   The line or altitude on a mountain or in polar regions beyond which trees do not grow due to cold temperatures, lack of soil, or wind.

   林线

   • The hikers stopped just below the timber line to set up camp.
   • Above the timber line, only low shrubs and mosses survive.
   • The timber line in the Alps is at about 2,000 meters.