The diffraction effect is the phenomenon of wave propagation into shadow region.

衍射则是电波绕射传播到遮蔽区的现象。

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Two CCD elements were designed specially in receiving part so as to resolve problems on measurement shadow region.

为了解决测量死区的问题，在信息的接受部分设计了两个CCD元件。

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The recognition results show that 40 features are effective on the target region and is not useful on the shadow region.

最终识别结果是：图像中目标区域的40个特征组合可以达到较高的识别概率，而阴影区域的40个特征组合的识别概率比较低。

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For decades, the conflict between Israelis and Arabs has cast a shadow over the region.

WHITEHOUSE: Moment of Opportunity: American Diplomacy in the Middle East & North Africa | The White House

But BP's disastrous oil spill in the Gulf of Mexico has cast another dark shadow over the region.

ECONOMIST: New Orleans five years after Katrina

Mr Lloyd, who was elected as PCC in November, said child sexual exploitation was a "hugely complex issue which casts a dark shadow" across the region.

BBC: Summit held to tackle child grooming in Greater Manchester