Among the ivory tower set, Columbia University, that august Ivy League institution that is now marking its 250th anniversary, may be lighting the way for other centers of learning.

虽然身在象牙塔中，最近正在庆祝250周年校庆的哥伦比亚大学，这所常春藤联盟的崇高学术殿堂，如今也走上另外一条「学无止境」的道路。

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By midmorning, we were done with the Eiffel Tower and had set off for Versailles.

NEWYORKER: The Grand Tour

The company that built London's Shard skyscraper has been chosen to oversee the construction of a tower in Saudi Arabia set to be the world's tallest.

BBC: Shard firm lands deal for world's tallest skyscraper

The clock tower was used to set a standard time.

UNESCO: Culture