... 碱土族元素 alkaline earth element 零族元素 group zero elements 硫属 硫族元素 chalcogen ...
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The transmitted signals which were modulated is a group of orthogonal sine signals as subcarrier and non-regular zero square waves that the code elements period is t as baseband coded formats.
它所发送的信号是由一组正交的正弦信号作为副载波，用码元周期为T的不归零方波作为基带码型调制而成的。
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