At the upper timberline the trees begin to become twisted and deformed.

上行树线，和雪线一样，热最高，极最低。从极的海平面到干燥的亚热的海拔4 500米处以及潮湿的热海拔3 500米至4 500米处都有上行树线。树线内通常是常绿树，它们和处于上行树线处极端恶劣环境中生长的落叶树木相比，具有一定的优势。然而，部分也有由落叶阔叶林组成的树线。例，马拉雅的部分，桦树就树线上。

Where the temperatures are warmer, broadleaf forests dominate.

气温较高的方，阔叶林占主导位。

It's spring in the great broad leaved forests of Eastern Europe and Asiatic Russia.

这是跨越东欧-亚洲-俄罗斯的 世上最大的落叶阔叶林的春天。

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。

And so this example of more rapid accumulation of carbon in deciduous broadleaf stands is a way of thinking of putting the brakes on the runaway train.

所以落叶阔叶林碳积累更快是一种给失控的列车踩刹车的方式。

The third type is mostly coniferous forest found in regions where temperatures are mild, like in the classic broadleaf, but where summer droughts occur.

- 第三类是针叶林， 主要分布气温温和的，典型的阔叶林， 但夏季会出现干旱。

In Asia, most of Eastern China was once covered in mostly broadleaf forest, but millennia of high populations in this region has resulted in all of the land given over to agriculture or urban development.

亚洲，中国东部的大部分曾经被阔叶林覆盖，但是数千年来该人口密集，导致所有土都被用于农业或城市发展。