对《Laravel 教程 - Web 开发实战入门 ( Laravel 5.5 ) 》一书中关于邮箱问题？

首先非常喜欢此书。
在按照书中带码操作时遇到：

php artisan make:notification ResetPassword

app/Notifications/ResetPassword.php

<?php

namespace App\Notifications;

use Illuminate\Notifications\Notification;
use Illuminate\Notifications\Messages\MailMessage;

class ResetPassword extends Notification
{
    public $token;

    public function __construct ($token)
    {
        $this->token = $token;
    }

    public function via ($notifiable)
    {
        return ['mail'];
    }

    public function toMail($notifiable)
    {
        return (new MailMessage)
            ->line('这里可以放我们需要添加的内容')
            ->line('You are receiving this email because we received a password reset request for your account')
            ->action('重置密码' , url(route('password.reset' , $this->token , false)))
            ->line('这里可以放我们需要添加的内容')
            ->line('If you did not request a password reset, no further action is required.');
    }

}

但是发送的邮件确实纯英文的（冒失我的类就没起作用）
app/Models/User.php

<?php

namespace App\Models;

use App\Models\User;
use App\Notifications\ResetPassword;
use Illuminate\Http\Request;
use Mail;
use Auth;

class User extends Authenticatable
{
    .
    .
    .
    public function sendPasswordResetNotification($token)
    {
        $this->notify(new ResetPassword($token));
    }
}

很是奇怪，请问这种问题，遇到该如何解决，或者说我该从什么地方着手，希望论坛中大手给个思路