1-C. In the 1950s, the term "high fidelity", or "hi-fi" for short, was commonly used by companies to advertise recordings and audio equipment providing the highest possible quality of sound reproduction.In the 1950s, the term "high fidelity", or "hi-fi" for short, was commonly used by companies to advertise recordings and audio equipment providing the highest possible quality of sound reproduction.  

1950年代には、用語「高忠実度」は、あるいは、「ハイファイ」、略してダヨ、一般的に使用されていた、企業でダヨ、録音を宣伝するためにダヨ、さらに、オーディオ機器をダヨ、最高の可能な限りの品質を提供するダヨ、音響の再生におけるダヨ。  

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