沉淀物 precipitate

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SQL Error: select id,classid,MATCH(title) AGAINST('19332177 21774679 precipitate' IN BOOLEAN MODE) as jhc from ***_enewssearchall where (id<>195754) and MATCH(title) AGAINST('19332177 21774679 precipitate' IN BOOLEAN MODE) order by jhc desc,infotime desc limit 0, 6