如果想从CAM植物中大量分离苹果酸，应该何时采样？

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SQL Error: select id,body,options from ***_enewstiku where sourceid='30528' and id < 2465190 and id<>'2465190' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30528' and id > 2465190 and id<>'2465190' order by id asc limit 5