... 强制检定 conoulsory verification 非强制性检定 optional verification 检定周期 period of verification ...
基于10个网页-相关网页
... 非必需附件；任选附件 optional accessories 非强制检定 optional verification 光声侦测器 optoacoustic detector ...
基于4个网页-相关网页
·2,447,543篇论文数据，部分数据来源于NoteExpress
Google jumped on board quickly, rolling out optional 2-step verification for its users.
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The "two-factor" verification system, which will be optional, asks users to register a phone number, e-mail account and six-digit code that would have to be entered, via text message, each time they log in to the site.
CNN: Twitter bumps up log-in security after hacks
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