It's not reasonable to force users to enter an email address to test the feature.

强迫用户填写电子邮箱地址来测试用户特征是不合理的。

youdao

You may have seen sites that ask you to enter an email address, a name, or other personal information before you're allowed to 'enter' the site.

你可能浏览过这样的网站：在被允许登录网站之前，要求填写电子邮件地址、姓名或者其它个人信息。

youdao

Mozilla wants to simplify the authentication process when connecting to websites by using just an email address without the need to enter an ID or a password.

Mozilla想要简化连接站点时的身份验证过程，它建议只使用email地址，而不需要输入ID和密码。

youdao

An added benefit would be to have a place for people to enter an email address for more information.

FORBES: Embracing Digital Distractions In Presentations

Open the app to enter an email address and password to begin listening.

ENGADGET: MetroPCS partners with Rhapsody to offer unlimited music in its rate plans

When a Nordstrom customer checks out with a mobile POS, they can sign for their purchase and enter an email address for a paperless receipt.

FORBES: Nordstrom Sees Sales Boost From Mobile POS Devices