δ因子是指

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SQL Error: select id,body,options from ***_enewstiku where sourceid='24125' and id < 2084313 and id<>'2084313' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='24125' and id > 2084313 and id<>'2084313' order by id asc limit 5