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顶级科技平台公司之间的制衡力体现，禁止精准广告推荐杀伤力不小。

Our advertising revenue growth in the second half of 2021 was adversely affected by reduced marketer spending as a result of limitations on our ad targeting and measurement tools arising from changes to the iOS operating system. We expect that future advertising revenue growth will continue to be adversely affected by these and other limitations on our ad targeting and measurement tools arising from changes to the regulatory environment and third-party mobile operating systems and browsers.