WP\\u Term对象中的“parent”和“category\\u parent”有什么区别？例如：

[1] => WP_Term Object
    (
        [term_id] => 24
        [name] => Essential Oils
        [slug] => essential-oils
        [term_group] => 0
        [term_taxonomy_id] => 24
        [taxonomy] => category
        [description] => 
        [parent] => 22
        [count] => 14
        [filter] => raw
        [cat_ID] => 24
        [category_count] => 14
        [category_description] => 
        [cat_name] => Essential Oils
        [category_nicename] => essential-oils
        [category_parent] => 22
    )