允许合同在完成之前由双方终止的条件称为下列哪项?

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SQL Error: select id,body,options from ***_enewstiku where sourceid='27021' and id < 2240967 and id<>'2240967' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='27021' and id > 2240967 and id<>'2240967' order by id asc limit 5