It was a small and peaceful demonstration so I don’t know why there was such a big police presence. It was like using a sledgehammer to crack a nut.这只是个小型的和平示威，真不明白为什么有那么多警察，简直是小题大做。She picked up the sledgehammer and beg...
Zooming and panning are navigational tools for exploring 2 D and 3 D information.缩放和平移是浏览二维和三维信息的导航工具.Panning and zooming, especially when paired together, create navigation difficulties for users.对于用户来说,平移和缩放一起使用时, 产生了更...