Southern Pennsylvania is still a world unto itself.

南宾夕法尼亚仍是一个自成一体的世界。

《柯林斯英汉双解大词典》

"It was a world unto itself," says one person involved at the time.

“这是一个自成体系的世界，”当时参与的一位人士说。

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"The Internet is a world unto itself," he said. "People must know how far they can go before they must stop."

“互联网也是个世界”他说：“人们应该知道在这里也有底线。”

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We'll think of something that's just a world unto itself and go and make a documentary.

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And, with one or two exceptions, like Vega Sicillia, which is a world unto itself, that would have been it.

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It was a world unto itself, that of the Princess Royal and Mrs.

NPR: Excerpt: Princesses