我会在顶部添加一个数组，以便在您遍历所有交易时存储公司的ID。

每次通过循环时，都会检查阵列中的当前公司ID。如果没有，则可以安全地显示该交易。然后将ID添加到数组中，以便下次该公司出现时，您可以跳过该公司的任何其他交易。

下面是您的新代码的外观。（我认为，用适当的变量替换“当前公司ID”，以便通过ID跟踪您的公司。）$term->ID, 但我承认，我只读了你的代码，对它的主要功能有了一个大致的了解。）

<?php
$num_cats_to_show = 50;
$count = 0;
/*----NEW STUFF----*/
$company_id_array = array();//NEW VARIABLE

$posts = new WP_Query(array(\'post_type\' => \'companies\'));
$terms = $posts->get_posts();
if ($terms) {
  foreach( $terms as $term ) {
    $args2=array(
      \'post_type\' => \'deals\',
      \'meta_query\' => array(
                        array(
                            \'key\' => \'company\', // name of custom field
                            \'value\' => \'"\'. ($term->ID) .\'"\', // matches exaclty "123", not just 123. This prevents a match for "1234"
                            \'compare\' => \'LIKE\'
                            )
                    ),
      \'posts_per_page\' => 1,
      );
    $my_query = null;
    $my_query = new WP_Query($args2);
    if( $my_query->have_posts() ) {
      $count ++;
      /*----NEW STUFF----*/
      if ($count <= $num_cats_to_show && !(in_array("the current company ID", $company_id_array))) {
        while ($my_query->have_posts()) : $my_query->the_post(); ?>
          /*----NEW STUFF----*/
          $company_id_array[] = "the current company ID";//ADD THE ID TO THE ARRAY (YOU HAVE ALREADY CHECKED THAT IT WASN\'T THERE YET)
          <?php echo $term->ID ?><p><a href="<?php the_permalink() ?>" rel="bookmark" title="Permanent Link to <?php the_title_attribute(); ?>"><?php the_title(); ?></a></p>
         <?php
        endwhile;
      }
    }
  }
}
wp_reset_query();  // Restore global post data stomped by the_post().
?>