Bohr and Einstein were considered the top two physicists in the world through the first part of the 20th century.
波尔和爱因斯塔被认为,是世界上顶尖的两个物理学家,在整个20世纪前页。
I've given you the periods at the top of the chart: early Bronze Age; middle Bronze Age from about 2100 to 1550; we date the late Bronze age from about 1550 until 1200--the introduction of iron and the beginning of the Iron Age in 1200. Prior to that, the Bronze Age, which is divided into these three periods.
我在这个表格的顶端给你们列了一些时期:,早期青铜时代;中期青铜时代,从约公元前2100年到前1550年;,晚期青铜时代,从公元前1550年到前1200年,即铁器时代前页;,然后公元前1200年开始了铁器时代,在那以前,青铜时代分为那样三个时期。
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