A ping flooding attack is a simple DDoS attack in which a computer sends a packet (ping) to another system with the intention of uncovering information about services or systems that are up or down.

ping洪水攻击是一种简单的DDoS攻击。在这种攻击中，一个计算机向另一个系统发送一个包(ping)，以找到关于服务或系统的信息。

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Their intention was to encourage those patient's immune systems to attack the tumours by training them to recognise the signs of active cytomegalovirus infection.

他们的打算是通过训练病人免疫系统来识别活跃的巨细胞病毒感染的特征来达到促使免疫系统攻击肿瘤的目的。

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There is, however, at least one electromagnetic weapon that is designed to attack enemy soldiers directly-though with the intention of driving them off, rather than killing them.

但是至少有一种电磁武器是直接针对敌方士兵的，虽然目的是将他们撂倒而不是杀了他们。

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But defense attorneys maintained the men were only talking big and had no intention of going through with an attack.

NPR: 5 Convicted Of Plot To Kill Fort Dix Soldiers

And if that was its intention, then it wouldn't have announced the attack of time.

NPR: Hackers Target Israeli Websites