範例1：刪除全部的文章分類
wp term list category --field=term_id | xargs wp term delete category範例2：刪除自訂分類 (Taxonomy)
wp term list my_tax --field=term_id | xargs wp term delete my_tax
wp term list category --field=term_id | xargs wp term delete categorywp term list my_tax --field=term_id | xargs wp term delete my_tax