Last Monday was the 80th anniversary of its museum status.

上个月是故宫博物院的80周年纪念。

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February of 2010 marks the 80th anniversary of the discovery of Pluto by American astronomer Clyde Tombaugh.

2010年2月是美国天文学家克莱德·汤博发现冥王星的80周年纪念。

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On the 80th anniversary of the biggest financial disaster of the 20th century, we look back at the events of the Wall Street crash.

时值华尔街股市大崩溃这个20世纪最严重的金融灾难80周年之际，让我们简单回顾一下那次股市大崩溃的经过。

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This year's Veterans Day, originally called Armistice Day, marks the 80th anniversary of the end of World War I.

CNN: Wednesday,

Ann Betar told the Hearst Connecticut Media Group around their 80th anniversary in November that family has been a key to their longevity.

WSJ: Conn. couple named 'longest married' in US

The Knox sale marks the 80th anniversary of the artist's death.

BBC: Isle of Man Archibald Knox collection to go on sale