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Reading, however, is silent by design. Unless readers add their own accompaniment.
然而，阅读本应安静——除非读者自己打开伴奏。
youdao
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The silent push-pull type, fixed type and other varieties of design;
有无声三折推拉式和固定式多种设计；
youdao
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The silent push-pull type, fixed type and other varieties of design;
有无声三折推拉式和固定式多种设计；
youdao