有个php方法，执行mysql语句，这个有点不大懂，求翻译

public function fetch_all_limit($start, $count)
{
// return $this->_db->select("osa_gzh", "*", ["LIMIT" => [$start, $count]]);
return $this->_db->select("osa_gzh", array(
"[>]osa_user" => array(
"muid" => "user_id"
)
), array(
"osa_gzh.id",
"osa_gzh.account",
"osa_gzh.name",
"osa_user.user_name",
"osa_gzh.status"
)
, array(
"LIMIT" => [
$start,
$count
]
));
}