Prehistoric Glacier Movement 史前冰河运动
Your textbook includes these as types, as a particular type of glacier movement, but you will see that there are as many textbooks that omit it as a type of movement as include it.
你们的课本中将这些分类，作为一种特殊类型的冰川运动，但是你们会发现，将其作为一种冰川运动类型的教科书和忽略这种类型的教科书同样多。
The study of Sanxingdui should take the investigation of weather three or four thousand years ago as the stand and analyze the durative drought, sudden flood and glacier movement.
三星堆文明，应从其所在的三四千年前的古气候考察为立足点，以持续性干旱、突发性洪水和山区冰川活动的灾害性现象为特征进行分析、研究。
It was found that the flood, coming from the modern glacier area of the source, was caused by breaking of ice-dam and coffer-dam lakes formed by blocking of river with glacier movement.
初步查明洪水来自源头时现代冰川区，是由于冰川前进阻塞河道，形成冰坝湖、堰塞湖，其溃决酿成大洪水所致。
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