opt in

US /ɑːpt ˈɪn/
UK /ɑːpt ˈɪn/
"opt in" picture
1.

选择加入, 同意

to choose to be part of an activity, plan, or group

:
•
Customers can opt in to receive marketing emails.
客户可以选择接收营销邮件。
•
You need to opt in to the new privacy policy.
您需要选择接受新的隐私政策。
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opt out
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optopt out