It has long been believed that the centuries between the Han and Tang dynasties were China's Dark ages-a time as devoid of cultural merit as Arabia's Empty Quarter is of trees.
长期以来人们一直以为，汉唐之间的数百年是中国的黑暗时代，其时中国一如寸草不生的阿拉伯鲁卡·哈利沙漠，在文化上纯属一片空白。
The new study found increasing death rates of several kinds of forests, like pine, fir and hemlock. The higher rates were observed among trees of different ages and sizes.
这项新研究发现几种林木的死亡率正在上升，比如松树，冷杉和铁杉。不同树龄和不同大小的树都被发现有较高的死亡率。
The images in all the paintings, whether they are trees and flowers or religious and legendary lay figures, are lifelike, showing realistically aspects of the life of the people in different ages.
每一幅壁画，从花草树木，到神佛人物，到当时人们活动的情形，无不栩栩如生。
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