so the sun's influence grows stronger 太阳的影响力逐渐增强 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 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 Broadleaves ar...
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 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 Broadleaves are much easier to eat and digest 阔叶树的树叶更容易食用和消化 so now...
This vast forest circling the globe 这片环绕着地球的广大森林 contains a third of all the trees on Earth 容纳了地球上1/3的树木 and produces so much oxygen 产生了大量氧气 it changes the composition of the atmosphere. 从而改变了大气成分 As we travel south 随着我们向南行进 so the sun'...
contains a third of all the trees on Earth 容纳了地球上1/3的树木 and produces so much oxygen 产生了大量氧气 it changes the composition of the atmosphere. 从而改变了大气成分 As we travel south 随着我们向南行进 so the sun's influence grows stronger 太阳的影响力逐渐增强 and at 50 d...
and produces so much oxygen 产生了大量氧气 it changes the composition of the atmosphere. 从而改变了大气成分 As we travel south 随着我们向南行进 so the sun's influence grows stronger 太阳的影响力逐渐增强 and at 50 degrees of latitude a radical transformation begins. 北纬50...
it changes the composition of the atmosphere. 从而改变了大气成分 As we travel south 随着我们向南行进 so the sun's influence grows stronger 太阳的影响力逐渐增强 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 Summers here are long...
In the Arctic winter 每到北极冬季 snow forms a continuous blanket across the land. 雪便为这片土地盖上一层广袤无边的银毯 But as spring creeps up from the south 可是随着春天渐渐从南方赶来 the taiga is unveiled. 泰加林带也揭开了它的面纱 This vast forest circling the globe 这片环绕着地球的广大森林 contai...
snow forms a continuous blanket across the land. 雪便为这片土地盖上一层广袤无边的银毯 But as spring creeps up from the south 可是随着春天渐渐从南方赶来 the taiga is unveiled. 泰加林带也揭开了它的面纱 This vast forest circling the globe 这片环绕着地球的广大森林 contains a third of all the trees ...
But as spring creeps up from the south 可是随着春天渐渐从南方赶来 the taiga is unveiled. 泰加林带也揭开了它的面纱 This vast forest circling the globe 这片环绕着地球的广大森林 contains a third of all the trees on Earth 容纳了地球上1/3的树木 and produces so much oxygen 产生了大量氧气 it changes...
the taiga is unveiled. 泰加林带也揭开了它的面纱 This vast forest circling the globe 这片环绕着地球的广大森林 contains a third of all the trees on Earth 容纳了地球上1/3的树木 and produces so much oxygen 产生了大量氧气 it changes the composition of the atmosphere. 从而改变了大气成分 As we t...