Cretaceous is the latest typical greenhouse Earth state, thus the systematic research on the desert evolution in these period is of great significance to understand the modern desert.
白垩纪作为距今最近的“温室地球”时期，对该时期的沙漠演化展开系统研究对认识现代沙漠形成演变具有重要意义。
There, under a sun that never sets, they anchor tents against freezing winds, post lookouts for polar bears, and begin coaxing the secrets of evolution from a rocky polar desert.
在那个极昼之地，他们在刺骨的寒风中固定好帐篷，设置好警戒北极熊的岗哨，然后从布满岩石的极地荒原中开始慢慢探寻进化的奥秘。
Evolution of desert is one of important aspect of Quaternary paleoclimate and paleoenvironment research.
沙漠形成演化是第四纪古气候、古环境研究的重要内容之一。
Warm and dry climate, water level declined, desert land and human activity are the primary reasons of this evolution.
造成湖岸形态变化的主要原因是气候暖干化、湖水位下降、土地沙漠化和人类活动的共同影响。
Warm and dry climate, water level declined, desert land and human activity are the primary reasons of this evolution.
造成湖岸形态变化的主要原因是气候暖干化、湖水位下降、土地沙漠化和人类活动的共同影响。
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