You'll need to travel 500 miles south from here before that is possible. 由此往南500英里的地方 才有可能生长着树木

95. and the sun does not set.
    不会出现日落
96. At these latitudes the sun's rays are glancing
    在这个高纬度地区 太阳辐射只能斜射到这片土地
97. and not enough of their energy reaches the ground to enable trees to grow.
    到达地面的能量很少 并不足以支持树木生长
98. You'll need to travel 500 miles south from here before that is possible.
    由此往南500英里的地方 才有可能生长着树木
99. These stunted shrubs mark the tree line -
    这些矮小的灌木标志着森林界线
100. the beginning of the boreal forest -
     北方森林由此开始
101. the taiga.
     这就是泰加林带

来自《行星地球 第一季 第一集 Planet Earth S01E01 从北极到南极》第 98 行