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1.The bismuth spiral is a complex system that requires careful analysis.
铋螺旋是一个复杂的系统,需要仔细分析。
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2. The bismuth spiral is used in the production of electronic devices.
铋螺旋用于生产电子设备。
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3.The bismuth spiral is a valuable resource for metallurgical research.
铋螺旋是冶金研究的重要资源。