WooCommerce：显示循环内的产品变化

How can I display the product variations for each product within a loop such as the one on the Shop page? Is there any function that I can add to the content-product template that retrieves the list of variations and displays them?

Best way to do this is alter the loop. Something like that will help:

   function filter_wc_query($query_args){
      if(is_archive()){ //here you can use any conditional function to show variations on 
        $query_args[] = ['post_parent'=> '*'];
      }
      return $query_args;
   }
   add_filter('woocommerce_get_query_vars','filter_wc_query');

Or if you want to this on view level: https://gist.github.com/lukecav/2470d9fe6337e13da4faae2f6d5fe15f

In this solution image you can grab by standard WP function:

get_post_thumbnail($product->ID,'shop_list');

But remeber that variation link will bring user to parent product and force him to select variation once more.

You can use this code to add product variation to the shop/product category loops

 // Load our function when hook is set
add_action( 'pre_get_posts', 'custom_modify_query_get_posts_by_date' );

// Modify the current query
function custom_modify_query_get_posts_by_date( $query ) {

    // Check if on frontend and main query is modified and if its shop or product category loop
    if( (! is_admin() && $query->is_main_query()) && ( is_shop() || is_product_category() ) ) {
        $query->set( 'order', 'ASC' );
        add_filter( 'posts_where', 'rc_filter_where' );
    }
    return $query;

}

// Add products variation post type to the loop
function rc_filter_where( $where = '' ) {

    $type = 'product_variation';
    $where .= " OR post_type = '$type'";

    return $where;

}