使用超声波雾化吸入器时，水槽内须有足够的（ ）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='30906' and id < 2486916 and id<>'2486916' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30906' and id > 2486916 and id<>'2486916' order by id asc limit 5