These floating megaliths drift sometimes for months before they slowly melt away.

这些飘流物有时需要数月之久才能融。

The researchers said part of one megalith helped solve the mystery.

数千年前，人们用这些石头建造标记、纪念碑和其他建筑物。

Some archaeological sites have always been easily observable for example, the Parthenon in Athens, Greece; the pyramids of Giza in Egypt; and the megaliths of Stonehenge in southern England.

有些考古遗址一直都很容易被观测到，如希腊雅典帕提侬神庙、埃及吉萨金字塔、英格兰南石阵。

The Los Angeles County Museum of Art (LACMA) has acquired an ambitious new director and some rich patrons, and it carefully planned the $10m logistical effort needed to move the “megalith”.

洛杉矶艺术博物馆刚迎来一位雄心勃勃新馆长和几位富有赞助人，它周密规划了一个耗资一千万美元物流方案来拖运这个“石”。