为了净化网络环境，打击网络谣言，公安部网安局已经开展为期100天的网络谣言打击整治专项活动。记者在7月19号从公安部获得最新消息公安部公布了打击整治网络谣言第3批10起典型案例。
The following is entirely a math question. As we know, PerspectiveProjection delivers perspective transformations in 3D represented by the interdependent values of fieldOfView and focalLength accord
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