First, select the Observation Plane object and the Front surface.

首先，选择观察飞机对象和前面表面。

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A general analytic expression of light intensity distribution at the observation plane is obtained by means of ambiguity function method. Some special cases are discussed and verified by experiments.

运用模糊函数方法给出系统观察面上一个更为普遍的光强分布数学表达式，并分析讨论一些特殊情况及相应的实验结果。

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He used the plane to make aerial surveys of the Kalahari's wildlife, and he and Delia conducted close observation of the social life of hyenas, learning about their surprisingly communal behavior.

他驾驶这架飞机对卡拉·哈里的野生动物进行空中飞行调查，同时他和迪丽娅还对鬣狗的群体生活进行了近距离观察以便了解它们令人惊奇的集群行为。

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This general observation is particularly true of the aerospace plane, whose technologies will be of such vital importance to U.S. security and commercial interests for generations to come.

CENTERFORSECURITYPOLICY: The National Aerospace Plane