tp3.2多个或者并且语句语法

$map['tid1&cid1'] =array($jmid,'0','_multi'=>true);
$map['tid2&cid2'] =array($jmid,'0','_multi'=>true);
$map['tid3&cid3'] =array($jmid,'0','_multi'=>true);
$map['_logic'] = 'or';

多个并且的字段用or链接