Broadleaves are much easier to eat and digest 阔叶树的树叶更容易食用和消化

115. so the sun's influence grows stronger
     太阳的影响力逐渐增强
116. and at 50 degrees of latitude a radical transformation begins.
     北纬50°的地方是一场重大变革的起点
117. Summers here are long enough for broadleaf trees to replace conifers.
     由于有足够长的夏季 阔叶林得以取代针叶林
118. Broadleaves are much easier to eat and digest
     阔叶树的树叶更容易食用和消化
119. so now animals can collect their share of the energy that has come from the sun.
     因此动物们也能获得 太阳馈赠给它们的那部分能量
120. It's summer
     现在是夏天
121. and these forests are bustling with life.
     森林中一片生机勃勃的景象

来自《行星地球 第一季 第一集 Planet Earth S01E01 从北极到南极》第 118 行