黄土高原半干旱的气候条件、稀疏的植被和疏松易蚀的黄土物质，是该地区高含沙水流形成的自然地理因素。

Semi arid climate, poor vegetation cover and highly erodible loess can be regarded as the main natural factors responsible for the formation of hyperconcentrated flows in the Loess Plateau, China.

youdao

前言：常规的铝合金碱蚀工序时间长，易产生“过腐蚀” ；

For normal alkali corrosion procedure of aluminum alloy, the treatment time is long, and exceeding corrosion will occur.

youdao

前言：常规的铝合金碱蚀工序时间长，易产生“过腐蚀” ；

For normal alkali corrosion procedure of aluminum alloy, the treatment time is long, and exceeding corrosion will occur.

youdao