The happening of debris flow is a complicated problem, and it is the outcome of polysynthesism coaction, this brought difficulty to analytical prediction of development trend of debris flow.
摘要
的发生与否是一个极其复杂的问题，而且是由多种因
共同作用的结果，这也给活动发展趋势的分析
来了困难。
的复合;句子中的数语合成一语The happening of debris flow is a complicated problem, and it is the outcome of polysynthesism coaction, this brought difficulty to analytical prediction of development trend of debris flow.
摘要的发生与否是一个极其复杂的问题，而且是由多种因共同作用的结果，这也给活动发展趋势的分析来了困难。
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