When you add water to sand, the mixture turned into almost a gel.
当你往砂子当中加水时，混合物几乎变成凝胶。
Concrete is a mixture of sand and cement.
混凝土是沙和水泥的混合物。
The bottom layer is a mixture of sand and clay.
最下面的一层是沙和泥的混合物。
P92 Concrete is a mixture of water, sand and gravel, and Portland cement.
混凝土是由水、沙和砾石、波特兰水泥拌合而成。
P92 Concrete is a mixture of water, sand and gravel, and Portland cement.
混凝土是由水、沙和砾石、波特兰水泥拌合而成。
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