我通过阅读了解到这一点this article. 这很简单，我所要做的就是：

更改$talks_cat_args[rewrite][slug] 从…起\'talks\' 到\'talks/category\' （我以前试过）但没成功…

确保register_taxonomy 在之前register_post_type.

读了这篇文章，但这基本上是因为“WP\\U重写的工作原理是，从某种程度上讲，破译永久链接的过程是自上而下的”

为了子孙后代，这里是最后的代码（稍加修改）。我不能说这是最好或最干净的方法，因为我对WordPress&；很陌生；PHP，但到目前为止它仍在工作。

 $talks_labels = array(
    \'name\'                => \'Talks\',
    \'singular_name\'       => \'Talk\',
    \'all_items\'           => \'All Talks\',
    \'add_new\'             => \'Add new\',
    \'add_new_item\'        => \'Add new Talk\',
    \'edit_item\'           => \'Edit Talk\',
    \'new_item\'            => \'New Talk\',
    \'view_item\'           => \'View Talk\',
    \'search_items\'        => \'Search Talks\',
    \'not_found\'           => \'No Talks found\',
    \'not_found_in_trash\'  => \'No Talks found in Trash\',
  );

  $talks_args = array(
    \'labels\'             => $talks_labels,
    \'public\'             => true,
    \'publicly_queryable\' => true,
    \'show_ui\'            => true,
    \'menu_position\'      => 5,
    \'rewrite\'            => array( \'slug\' => \'talks\', \'with_front\' => false ),
    \'has_archive\'        => \'talks\',
  );


  $talks_cat_labels= array(
    \'name\'              => \'Talk categories\',
    \'singular_name\'     => \'Talk category\',
    \'search_items\'      => \'Search talk categories\',
    \'all_items\'         => \'All talk categories\',
    \'parent_item\'       => \'Parent talk category\',
    \'parent_item_colon\' => \'Parent talk category:\',
    \'edit_item\'         => \'Edit talk category\',
    \'update_item\'       => \'Update talk category\',
    \'add_new_item\'      => \'Add new talk category\',
    \'new_item_name\'     => \'New talk category name\',
  );

  $talks_cat_args = array(
    \'hierarchical\' => true,            
    \'labels\' => $talks_cat_labels,
    \'show_admin_column\' => true, 
    \'show_ui\' => true,
    \'query_var\' => true,
    \'rewrite\' => array(
      \'slug\' => \'talks/category\',
      \'with_front\' => false
    ),
  );

  register_taxonomy( \'uc_talks_cat\', array(\'uc_talks\'), $talks_cat_args );
  register_post_type( \'uc_talks\', $talks_args );