以下为句子列表：
英文: 3 Although there is reason to hope that superconductivity may one day be found to exist in some materials at room temperature, for the moment is a phenomenon of the utterly cold.
中文: 译文：虽然有理由指望有一天可以发现某些材料在室温下会具有超导性，但目前超导性还只是一种极不热门的现象。
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英文: Although it occurs only at very low temperatures, superconductivity has a wide variety of present-day uses, as well as potential future applications.
中文: 虽然超导现象只能发生在极低的温度下，但不论是现在或是未来，超导体都有广泛的应用。
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英文: On the other hand, in the four years since the discovery of superconductivity in this compound, the research community has made considerable improvements in critical current density, both in the low-field value and, perhaps more important, in the higher-f
中文: 另一方面，在发现这个化合物具有超导性的四年后，不论是在低磁场，或者是在更重要的较高磁场下，这个研究领域的专家已经将临界电流密度提高了许多。
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英文: Physicists know that in both types of material, the superconductivity is caused by electrons pairing up and gathering en masse in a single collective quantum state.
中文: 在这两种超导体材料中，超导电性是由于电子成双成对地集结在单一的量子态所产生，这是物理学家已知的部份。
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英文: The fact that the shift in Tc was a little larger than the simple prediction can be accommodated by BCS theory—it indicates that the boron vibrations are more important to the superconductivity than the magnesium vibrations [see box on page 87].
中文: 虽然这个温度偏移比理论值稍微大了一点，不过还是符合BCS理论的结果：在影响硼化镁超导性的因素中，硼的振动比镁的振动更重要（参见107页〈结构与键结〉）。
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