双语例句
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It is shown that cascade connection type two-port networks set make multiplication group, and parellel or series connection type two-port networks make addition group.
研究的结果表明，双口网络集合的级联构成乘法群，双口网络集合的串、并联构成加法群，双口理想变换器和器件的集合之间存在子群与陪集的关系。