我已使用此代码更改特色图像链接的文本：

function slider_change_featured_image_text( $content ) {
if ( \'twabc\' === get_post_type() ) {
    $content = str_replace( \'Set featured image\', __( \'Set Slider Image \', \'slider\' ), $content );
    $content  .= \' <br/> <strong>Note :For better view , please upload image of size  2000 X 995.</strong> \';
    $content = str_replace( \'Remove featured image\', __( \'Remove Slider Image\', \'slider\' ), $content );
}
return $content;
}
add_filter( \'admin_post_thumbnail_html\', \'slider_change_featured_image_text\' );