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Feb 28th 1953 in Britain, scientists say they found the double helix structure of DNA, the molecule that contains the human genes.
1953年2月28日在英国，科学家称他们发现了DNA的双螺旋结构，DNA分子中包含基因。
Years later, Francis Crick describes this discovery that he and fellow scientist James Watson made.
数年后，弗朗西斯·克里克对这一发现进行了描述，该发现是由克里克和另外一名科学家詹姆斯·沃森共同实现。
Biological systems are the result of evolution and they produce very complicated things.
生物系统源自进化，它所呈现的事物非常复杂。
Now the reason that DNA looks so beautiful and simple is that it goes right back to near the origins of life.
DNA结构美丽简单，其原因是它回归到了生命的最初阶段。
1993, start of an arms standoff at the Branch Davidian compound in Waco, Texas.
1993年在德州韦科，大卫教派总部发生武器对峙事件。
Federal agents try to arrest religious leader David Koresh for stock piling guns and explosives.
联邦探员试图逮捕宗教领袖大卫·考雷什，原因是他囤积枪支和炸药。
That sparks a shoot-out which kills four agents and six of Koresh's Davidian followers.
此举引发枪战，造成四名探员死亡，六名考雷什追随者死亡。
The standoff ends 51 days later when the compound burns to the ground, killing nearly 80 people.
此次对峙事件于51天后结束，总部被烧为平地，近80人遇难。
1986, Sweden's Prime Minister Olof Palme is shot to death in central Stockholm. His murder remains unsolved.
1986年，瑞典首相帕尔梅在斯德哥尔摩市中心遭枪杀，尚不知凶手身份。
And 1983, All is quiet on New Year's Day. Rock group U2 releases its War album, among the tracks New Year's Day and Sunday Bloody Sunday.
1983年，新年这一天安安静静，摇滚乐团U2发布新专辑《战争》，歌曲包括《新年》和《血腥星期天》。
Today in history, Feb 28th, Sandy Kozel, the Associated Press.
以上是2月28日《历史上的今天》，美联社珊迪·柯泽尔为您播报。
