您可以通过修改draftballot类中的验证方法voter_is_okay来加强这种限制，使其在进行验证时参考一个可接受的电子邮件地址。
You could further tighten the system by modifying the validation method voter_is_okay within the DraftBallot class to consult a list of acceptable E-mail addresses.
您可以通过修改draftballot类中的验证方法voter_is_okay来加强这种限制，使其在进行验证时参考一个可接受的电子邮件地址。
You could further tighten the system by modifying the validation method voter_is_okay within the DraftBallot class to consult a list of acceptable E-mail addresses.
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