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1s等于多少ms,多少us,多少ns1秒 (s) 等于 1000毫秒 (ms)。1毫秒 (ms) 等于 1000微秒 (us)。1微秒 (us) 等于 1000纳秒 (ns)。1纳秒 (ns) 等于 1000皮秒 (ps)。皮秒（ps）是时间的单位，1. Welcome to the world of warcraft housing forum! This forum is here to provide you with a friendly environment where you can discuss all aspects of housing with other players.
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.
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