You'll need to give a valid E-mail address, to which your key will be sent.

您将需要提供一个有效的电子邮件地址，这样就可以把您的key到其中。

youdao

Facebook requires new members to provide a valid E-mail address before completing registration.

Facebook要求新用户在完成注册前提供一个有效的电子邮件地址。

youdao

If you are entering event values that trigger a doctor notification, you'll need to enter a valid E-mail address as well.

如果输入了触发医生通知的事件值，那么还将需要输入一个有效的电子邮件地址。

youdao

Even reputable news sites often only check that the e-mail address you have given is valid, but make no effort at all to verify that you are who you claim to be online.

BBC: Microsoft wants to change passwords for something better

Travelocity and the FAA recommended printing out a copy of the reservation receipt, which could be an e-mail message, although it was unclear what would constitute a valid receipt.

CNN: FAA imposes restrictions on e-tickets