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1·So, it can be concluded that sand drift activity and aeolian landform forming are mainly taking place in warm dry period.

可见，区内风沙活动及风成景观的塑造过程，主要是在暖干期进行的。

2·Nabkha dune is a kind of typical aeolian landform. The wind power, sand source and plant are the mainly influencing factors of the development of nabkha.

灌丛沙堆是一种重要的风积地貌类型，风力、沙源、植物是影响灌丛沙堆发育的主要因素。

3·The main cause of desertification is overgrazing and its leading indicator is the form of aeolian landform, by which the grade of desertification is determined.

首要的是风沙地貌特征，沙漠化土地的分级主要依此而定。