做以下的定义，修改第三行的代码，放到functions.php文件中，all will be ok!
<?php
$custom_more = "Continue reading this post";
add_filter( 'the_content_more_link', 'my_more_link', 10, 2 );
function my_more_link( $more_link, $more_link_text ) {
return str_replace( $more_link_text, $custom_more, $more_link );
}
?>