这不需要使用JavaScript或jQuery。通过以下内容，您将能够用属性术语描述替换变化描述：

add_filter( 'woocommerce_available_variation', 'display_available_attributes_term_description', 10, 3 );
function display_available_attributes_term_description( $data, $product, $variation ) {
    $terms_descriptions = array(); // Initialize variable

    // loop through attributes variation
    foreach( $data['attributes'] as $attr_taxonomy => $term_slug ) {
        $taxonomy = str_replace('attribute_', '', $attr_taxonomy);
        // Check that is not a custom attribute
        if( ! taxonomy_exists($taxonomy) ) {
            continue;
        }
        $term_id = get_term_by('slug', $term_slug, $taxonomy)->term_id; // Get the term ID
        $term_description = term_description( $term_id ); // Get the term description
        // Check that term description is not empty
        if( ! empty($term_description) ) {
            $terms_descriptions[] = $term_description; // Add the term description to the array
        }
    }
    // Replace variation description with attribute(s) term description(s)
    if( count($terms_descriptions) > 0 ) {
        $data['variation_description'] = implode(' <br>', $terms_descriptions); // stringify the array
    }

    return $data;
}

代码放在子主题的functions.php文件中（或插件中）。测试和作品。
如果要保留变体说明，并在其后显示属性术语说明，请替换：

$data['variation_description'] = implode(' <br>', $terms_descriptions);

使用：

$data['variation_description'] .= ' <br>' . implode(' <br>', $terms_descriptions);