The black hole attack and the gray hole attack on the networks running under the AODV protocol are discussed.
重点讨论在AODV协议下的黑洞攻击和灰洞攻击，并根据攻击的特点，提出了一种利用虫洞原理防御的策略。
The gray circle at the center of each image is the "pole hole," north of which satellite sensors have historically been unable to collect data.
每幅图中心位置的灰色圆圈是“极点”，卫星从来都无法在极点以北收集数据。
At last a gray rat came out of the hole.
终于，一只灰色的小老鼠从洞里钻了出来。
At the mention of the old black rabbit hole, the small gray doves arrive immediately to the spirit, he head a little crooked, others had nothing on deaf ears.
老黑母兔一提到地洞，小灰鸽立刻来了精神，他把小脑袋一歪，别的啥也没有听进去。
Copper nickel good machinability and bad crack resistance. Repair welding of sand hole and gray cast iron machined surface subject to no load.
镍铜，易加工，但抗裂性较差。不受力的灰铸铁加工面及砂眼补焊。
Copper nickel, good machinability and bad crack resistance. Repair welding of sand hole and gray cast iron machined surface subject to no load.
镍铜，易加工，但抗裂性较差。不受力的灰铸铁加工面及砂眼补焊。
Copper nickel, good machinability and bad crack resistance. Repair welding of sand hole and gray cast iron machined surface subject to no load.
镍铜，易加工，但抗裂性较差。不受力的灰铸铁加工面及砂眼补焊。
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