The threat of winter frost is not the only reason for trees to shed leaves. 寒冬的威胁不是树木落叶的唯一原因
and the trees must shut down and shed their leaves in preparation for the cold dark time ahead. 树木开始减缓代谢,树叶开始凋零, 以准备迎接寒冬的到来
The ground living plants are in a hurry. Before long the trees above will come into leaf and steal their light. 地表植物正在匆忙生长, 不久之后,树木长出的新叶将会重新把阳光夺去
and the trees enjoy a marked spurt in growth. 树木也可以享受疯长的乐趣
Here, instead of conifers, there are broad leaved trees 阔叶林代替针叶林
Where the growing season is longerm, there are alerce trees the redwoods of the south. 由于更长的生长季节, 南半球也有红杉-智利柏树
Here in South America araucaria trees or monkey puzzles are like the conifers of the Taiga. 这是南美洲, 绰号叫“猴子谜”的南洋杉看上去和极地针叶林没什么两样
Leaping from the world's tallest trees is not for the faint hearted. 要从世界上最高的树木上跳下,可不能恐高
than in any tropical rainforest but it's all contained within the trees. 巨大针叶林里的有机物质要多的多 但是都在大树里