年代较近的针叶树林场还比不上年代久远的林场。The more recent conifer plantations cannot yet compare with the old woodlands.冷杉 、 云杉和松树都是针叶树.Firs, spruces and pines are conifers.萨维斯 讨论了针叶树的致死的基因性质.Sarvas discusses the nature of the " lethal load...
温暖的天气融化了一些极地的冰雪。Warmth melted some of the polar ice.但是全球变暖正在融化极地的冰川而这干扰了这个洋流.But global warming is melting the polar ice caps and disrupting this flow.威利·赫伯特是当今仍健在的最伟大的,最早探险极地的人.Wally Herbert is the greatest pioneering p...