1、
本文用经典理论、双流不稳定性理论及磁增强效应，计算了强流相对论电子束在靶物质中的射程及沉积功率。
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2、
The deposition of sediment in our natural stream channels has greatly aggravated floodwater damages.
泥沙淤积在天然河道,已大大加剧了洪水的危害.
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3、
Therefore, deposition occurred in a fresh water environment in stream channels and river terraces.
因此, 沉积发生在淡水环境中的流渠道和河流阶地.
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