电介质的极化的强弱采用（）来表示。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='32664' and id < 2597752 and id<>'2597752' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='32664' and id > 2597752 and id<>'2597752' order by id asc limit 5