Palaeoenvironmental reconstruction in the time has a profound significance for understanding global environmental change.
恢复这一时期的古环境，对了解全球环境变化具有重要的意义。
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Loess and aeolian deposits were found in the area around Qinghai Lake. It is well known that loess is regarded as one of the best terrestrial archives of palaeoclimatic and palaeoenvironmental change.