求翻译,这是雅思真经5里的一篇文章的句子,谢谢!!!
Bythefollowingyear,hehaddevelopedanimprovedsystem;hecreatedadot-and-dashcodethatusedd...
By the following year, he had developed an improved system; he created a dot-and-dash code that used different numbers to represent the letters of the English alphabet and the ten digits.
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