混凝土是由水泥、沙子和碎石并和水混合而成的。

Concrete is made of cement, sand, and gravel mixed with water.

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混凝土是水泥、沙子和碎石加水构成的。

Concrete consists of cement, sand and gravel, mixed with water. .

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混凝土是水泥、沙子和碎石加水构成的。

Concrete consists of cement, sand and gravel, mixed with water. .

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