以下为句子列表：
英文: This paper gets the frequency stability of a sine wave using a digital method.
中文: 摘要本文实现了利用数字方法计算正弦波的频率稳定度。
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英文: This paper introduces the basic concepts and importance of short-term frequency stability and phase noise, its expression in time domain and in frequency domain, the methods of measurements of phase noise and compares their advantages and disadvantages re
中文: 摘要叙述了短期频率稳定度、相位噪声的基本概念和重要性、在时域和频域中的表达方法以及各种相位噪声的测量方法，并且分别比较了各种方法间的优缺点。
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