认识黏土(1)
来源:沪江听写酷
2007-08-01 00:00
CLAY,黏土,是从哪里来的,又上哪里去呢?
Clay is found almost everywhere in the world. It is formed by the action of wind and water on rocks over thousands of years. The rocks change in both chemical and physical ways. Chemically, elements like potassium and aluminum are added and taken away. Physically, the rocks break down into sm…
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