以下为句子列表：
英文: Studied periodic function and its least positive period.
中文: 摘要研究了周期函数及其最小正周期的若干问题。
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英文: The periodic function is separated into the digital quantity. it has the high stability signal sweep frequency using the phase-lock link to carry on to the digital quantity reading, through D/A transformation, the appropriate filter may obtain the high st
中文: 摘要将周期函数离散成为分离的数字量，利用锁相环产生高稳定度的信号扫描频率对数字量进行读取，经过D/A变换及恰当的滤波可以获得高稳定度的信号输出。
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