举例说，橡胶用来使电线绝缘。

For instance, rubber was used to insulate electrical wires.

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我们可用橡胶使带电的电线绝缘。

We can insulate a live wire with rubber.

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橡胶皮保护孔的边缘，以防止损坏电线电缆。

Rims of holes shall be protected by rubber to avoid any damage.

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橡胶皮保护孔的边缘，以防止损坏电线电缆。

Rims of holes shall be protected by rubber to avoid any damage.

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