Much of the money for Pakistan was spent on physical security, like fencing and surveillance systems, and equipment for tracking nuclear material if it left secure areas.

也花费很多财力用于巴基斯坦核武器的物理安全，如隔离和监督系统，以及核原料离开安全区域的跟踪设备。

youdao

Both sides are expressing concern over North Korean statements on Friday that Pyongyang is continuing to extract plutonium from spent nuclear fuel for material useable in weapons.

VOA: standard.2009.09.06