Flow velocity, at this location, can never exceed the local speed of sound, and is said to be in a choked condition.

流速，在这个位置，绝不能超过当地音速的，据说是在一个呛条件。

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Then, the scouring and silting characteristics of debris flow and their affecting factors including debris flow scale and local channel condition were explored by analyzing field survey data.

通过实际测量，分析了泥石流在沟道内冲淤特征以及影响泥石流冲淤特征的因素，如泥石流活动规模和局部沟道条件等。

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