2FA provides much better security than passwords alone, but not every website supports it. You can find a list of websites that support 2FA at <a { $url_2fa }>https://twofactorauth.org</a>, as well as a list of sites that don’t support 2FA and ways you can ask them to add support.
2FA 提供的安全性比只有密码要好得多，然而并不是每个网站都支持。您可以在 <a { $url_2fa }>https://twofactorauth.org</a> 上找到支持和不支持 2FA 的网站列表，以及要求后者添加支持的途径。