xinglian/application/admin/lang/zh-cn/newsmessage.php

<?php

return [
    'Id'            => 'ID',
    'User_id'       => '用户ID',
    'Message'       => '留言内容',
    'Images'        => '图片',
    'Answer'        => '回复',
    'Createtime'    => '创建时间',
    'Updatetime'    => '更新时间',
    'User.username' => '用户名'
];