contains a third of all the trees on Earth 容纳了地球上1/3的树木

108. But as spring creeps up from the south
     可是随着春天渐渐从南方赶来
109. the taiga is unveiled.
     泰加林带也揭开了它的面纱
110. This vast forest circling the globe
     这片环绕着地球的广大森林
111. contains a third of all the trees on Earth
     容纳了地球上1/3的树木
112. and produces so much oxygen
     产生了大量氧气
113. it changes the composition of the atmosphere.
     从而改变了大气成分
114. As we travel south
     随着我们向南行进

来自《行星地球 第一季 第一集 Planet Earth S01E01 从北极到南极》第 111 行