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溝头前进是高原溝壑区主要侵蝕形式之一,几年来測驗和調查的資料可以証实这一点。現在先看一看下面的材料。
Gully advancement is one of the major forms of erosion in the gully areas of the plateau. Data from tests and surveys over the past few years confirm this point. Now take a look at the material below.