财联社7月20日消息，乌克兰粮食想要大规模向外出口，无外乎两条路：要么从敖德萨等乌南部港口通过黑海走海路运输，要么则通过与乌克兰毗邻的波兰、匈牙利等陆路边境口岸出口。
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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