最后，用前期环流特征量为因子建立了祁连山主区层状云频率的预测模型。
Finally, a forecast model of frequency of stratiform clouds in Qilian Mountains was built based on the circulation characteristic factors.
主量元素特征表明卡拉塔格岩体属富钠的钙碱性系列；
The major element characteristics show that the intrusion belongs to the sodian calc-alkaline series.
当支沟泥石流输入主河的泥沙量小于主河的输沙量时，主河河床将下切，并逐渐恢复山区性河流的特征。
The main channel bed will scour if sediment amount from tributary debris is less than that the main stream can carry and the river evolution exhibits the characteristic of mountainous rivers.
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