其他条件相同时，铜比铁热得快。

Other things being equal, copper heats up faster than iron.

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铜比铅的电阻要小。

Copper has less resistance to electricity than lead.

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结果发现，随镍铜量或镍铜比的增加，烧结温度下降，合金的晶粒球化、细化。

The results show that the sintering temperature decreases and the alloy grain is spheroidized and is refined with the increase of Ni and Cu or the ratio of Ni to Cu.

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