红粘土是一种区域性的特殊土。

Red clay is one of special soil and often found in engineering.

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宜兴紫砂陶器是由一种奇特的当地红粘土制成的。

Yixing's brown earth pottery is made of a peculiar kind of local red clay.

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宜兴紫砂陶器是由一种奇特的当地红粘土制成的。

Yixing's brown earth pottery is made of a peculiar kind of local red clay.

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