For more than 300 years, we thought Saturn was the only body in the solar system with rings.

在300多年的时间里，我们一直认为土星是太阳系唯一拥有光环的天体。

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Ten thousand years of tree rings show that the carbon-14 level rises and falls about every 420 years.

一万年的树木年轮显示，碳14水平大约每420年上升和下降一次。

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Buckley isn't an archaeologist. He studies tree rings, which record the growth history of trees that can be hundreds of years old, or even older.

VOA: standard.2010.04.05

Using samples from around Southeast Asia, Buckley and his colleagues saw this pattern in tree rings from recent years, when he could corroborate the rings with other historical climate information.

VOA: standard.2010.04.05

In a Democrat-dominated state, the Clinton-Gore message, chiming with the goal of reducing California's oil consumption by 25% in ten years, rings in tune with a culture of environmental activism.

ECONOMIST: The row over severance

Tiffany immediately launched an investigation and said that it learned that Costco has been selling different types of rings for many years identified as "Tiffany" rings, without the company's knowledge.

WSJ: Tiffany sues Costco over engagement rings

Peter Jackson was hailed for several years as The Lord of the Rings dazzled and exceeded expectations.

FORBES: 'The Hobbit' Review: Peter Jackson's Return To Middle-Earth Is A Triumph