双语例句
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Water cannot easily flow in these impermeable rocks.
水不容易流进那些不透水的岩石.
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Conductors like metals and salt water tend to have loosely bound outer electrons, which can easily flow between molecules.
像金属和盐水一样的导体往往带有受到束缚较弱的外层电子，这些电子能够轻易在分子间流动。