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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. Discuss world of warcraft general discussion discuss world of warcraft housing legion remix oceanic general discussion to provide a friendly and focused environment for. 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.
'This Is Us' cast and crew mourn Jas Waters, writer who died at 39
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