public static function getPublicPhrase($select=null)
	{
		$criteria=new CDbCriteria;
		$criteria->condition = 'phrase_id > :first AND phrase_id < :last';
		$criteria->params = array(
			':first'=>1000, 
			':last'=>1500,
		);
		if($select != null)
			$criteria->select = $select;
		$model = self::model()->findAll($criteria);
		
		return $model;
	}