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》

I hereby wish to reiterate that since the very first day when China came into possession of nuclear weapons, China has undertaken not to be the first to use nuclear weapons under any circumstances.

我再次重申，中国从拥有核武器起，就承诺在任何情况下都不首先使用核武器。

youdao

How the lost art came into Oewerdieck's possession in the first place still isn't clear.

这些丢失的艺术品如何从一开始就成为Oewerdieck的财产仍旧没有定论。

youdao

Back in January, with the whole country watching, this team lined up against the number-one ranked, undefeated Fighting Irish of Notre Dame, and dominated from the first possession.

WHITEHOUSE: President Obama Welcomes BCS National Champion Alabama Crimson Tide | The White House

Barnsley could not make the most of good possession in the first-half and the hosts broke the deadlock in the 50th minute when Eagles angled his shot past Luke Steele from long range.

BBC: Burnley 3-0 Barnsley

The Irish province enjoyed much of the first-half possession but their progress was halted by a combination of handling errors and stubborn defence from their well-organised opponents.

BBC: Munster 19-17 Montauban