variation of the sediment transportation
variation of the sediment transportation
泥沙输运的变化
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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Firstly, the characteristics of debris-flow sediment transportation such as intensity, granule gradation and space-time variation were discussed on the base of continuous observation data.
在连续观测资料的基础上，对泥石流输沙的强度、级配和时空分布特征进行了分析。
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