the treeline
noun [ S ] uk/ˈtriː.laɪn/ us/ˈtriː.laɪn/ (US also the timberline)
林木线（林木能够生长的海拔上限或最高纬度）
the height above sea level or the distance south or north of the equator after which trees do not grow
江苏热线英汉汉英双解词典包含207361条英汉翻译词条，涵盖了常用英语单词及词组短语的翻译及用法，是英语学习的必备工具。