聚合酶链反应可表示为

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SQL Error: select id,body,options from ***_enewstiku where sourceid='32328' and id < 2570489 and id<>'2570489' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='32328' and id > 2570489 and id<>'2570489' order by id asc limit 5