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Join discussions, share insights, and connect with the world of warcraft community on these forums. 1s=1000ms,1ms=1000us 1秒=1000毫秒 (ms),1毫秒=1／1000秒 (s)； 1秒=1000000 微秒 (μs),1微秒=1／1000000秒 (s)； 1秒=1000000000 纳秒 (ns),1纳秒=1／1000000000秒 (s)； 1. 从字面意思理解： 1.美国正式的全称 the united states of america 2.拆分 ：united联合的+states州（美国有50个州1个特区）+america美洲=美利坚合众国，美国是 联邦制 可以从国家名.
US Presidents Ranked by IQ Which one had the Highest?
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