First, the weapons should be intended for use only in retaliation after a nuclear attack. Second, the possession of the weapons must be a temporary expedient.

首先，这些武器应当只在遭受核袭击后反击时才使用。其次，这些武器的拥有必须是一种临时的应急手段。

《柯林斯英汉双解大词典》

Police said they believed the attack was in retaliation for the death of the drug trafficker.

警方说他们认为这起袭击是为那个毒贩的死而实施的报复。

《柯林斯英汉双解大词典》

Heavy mortar exchanges have since erupted in the Bakara market area of Mogadishu, A spokesman for the al Shabab terrorist group claimed the suicide attack was in retaliation for the killing of a wanted senior al-Qaida operative in the region.

VOA: standard.2009.09.17

Renamo said it launched the attack in retaliation for the police raids on meetings they were holding in the towns of Gondola and Muxungue.

BBC: Mozambican ex-rebels Renamo in police clash

According to the BBC, Spamhaus said the attack was in retaliation for its blacklisting of the Dutch company.

WSJ: Cyberattack on Spam Fighter Said to Be Over

The US military said it did not believe the attack was in retaliation for the incident with the wedding party.

BBC: US team probes Afghan wedding raid