当需要设置当前位置为摄像机视角的时候，
windows电脑快捷键：ctrl+alt+0
电脑用快捷键：control+option+0
但是！！！这个点“0”是小键盘的“0”，我们没有小键盘，怎么办啊。
【视图】-【对齐视图】-【活动摄像机对齐当前视图】
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