目标是对注释分页，以最高的comment_rating 元值优先。

多亏了cjbj的回答以及米洛和比吉尔的评论，我找到了这个问题的非直观解决方案。

通过使用number和offset 我能够按正确的顺序生成结果，但分页很奇怪，每5篇文章似乎都在每一页上“翻转”。

这是我的解决方法，产生了一个评论列表，从评分最高的第一个开始，评分最低的最后一个开始。

$orderby = \'top-comments\';

$args = array(
    \'post_id\' => $post_id,
    \'type\' => \'comment\',
    \'status\' => \'approve\',
    \'hierarchical\' => true
);

if ( $orderby == \'top-comments\' ) {
    $args[\'meta_key\'] = \'comment_rating\';
    $args[\'orderby\'] = \'meta_value_num\';
    $args[\'order\'] = \'ASC\';
}

// 5 Comments per page
$comments_per_page = $number = 5; 

// Get the comment count to calculate the offset
$comment_count = wp_count_comments($post_id)->approved;

// Currently page 1 (set with AJAX in my case)
$page = 1;

// Rather unintuitively, we start with the total amount of comments and subtract
// from that number 
// This is nessacary so that comments are displayed in the right order
// (highest rated at the top, lowest rated at the bottom)

// Calculate offset
$offset = $comments_count - ($comments_per_page * $page);

// Calculate offset for last page (to prevent comments being shown twice)
if ( $offset < 0 ) {
    // Calculate remaining amount of comments (always less than 5)
    $comments_last_page = $comments_count % $comments_per_page;

    // New offset calculated from the amount of remaining comments
    $offset = $offset + $comments_per_page - $comments_last_page;

    // Set how many comments the last page shows
    $number = $comments_last_page; 
}

// Then we pass the $number and the $offset to our query args
$args[\'number\'] = $number;
$args[\'offset\'] = $offset;

$comments_query = new WP_Comment_Query;
$comments = $comments_query->query($args);

// Result: 5 comments, starting with the highest rating at the top, and the
// lowest rated at the bottom