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| 1. | an excellent conductor of heat and electricity -- and at times stubbornly resistant to both. |
| 本是热和电的优良导体，但有时却顽强地抗拒二者。 |
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| 2. | "Copper:A ductile, malleable, reddish-brown metallic element that is an excellent conductor of heat and |
| 铜：一种有韧性、可延展的红棕色金属元素，是热和电的极好导体，广泛用于电线、水管及防腐蚀零件中，其形式可以是纯铜也可以是黄铜或青铜合金. |
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