The most beautiful time in English is usually translated as "the golden age" or "the best of times". This phrase comes from a line in Charles Dickens' novel "A Tale of Two Cities", which reads: "It was the best of times, it was the worst of times." This line is often used to describe a time of great prosperity and happiness, as well as a time of great difficulty and sorrow.

Here are some example sentences in English and their Chinese translations:

"The golden age of Hollywood was the 1950s, when many classic films were made." (中文翻译: 五十年代是好莱坞的黄金时代, 许多经典电影都是在那时制作的。)

"The best of times for the economy was during the period of high growth in the 1990s." (中文翻译: 在 90 年代经济高速增长时期是经济最好的时候。)

"The golden age of exploration was the 15th and 16th centuries, when many European explorers set out to discover new lands." (中文翻译: 十五、十六世纪是探索的黄金时代, 许多欧洲探险家在那时出发去发现新大陆。)