我试图输出最后（按时间顺序）4篇带有标签（slug）“pp”的帖子。

<ul>
<?php
$args = array( \'posts_per_page\' => 4, \'taxonomy\' => \'tag\', \'field\' => \'slug\', \'terms\' => \'pp\' );
$tag_posts = get_posts( $args );
foreach ( $tag_posts as $post ) : 
  setup_postdata( $post ); ?>
    <li><a href="<?php the_permalink(); ?>"><?php the_title(); ?></a></li>
<?php endforeach; 
wp_reset_postdata(); ?>
</ul>

这段代码虽然输出了同一篇文章的4个条目，但这是最后一篇文章的第四条！为什么？：）

$args = array(
    \'posts_per_page\' => 4,
    \'tax_query\' => array(
        array(
            \'taxonomy\' => \'tag\',
            \'field\' => \'slug\',
            \'terms\' => \'pp\'
        )
    )
);