Pakistan's nuclear Arsenal is now thought superior to India's in both size and effectiveness.

现在普遍认为巴基斯坦的核武库在规模和效力上都优于印度。

youdao

Israel, itself the possessor of a nuclear arsenal of unknown size, is also watching closely and is quite capable of taking unilateral action if it feels threatened as the destruction of the Iraqi reactor in 1981 showed.

BBC: Nuclear threat casts global shadow

Cutting the size of the nuclear arsenal to a small fraction of its Cold War size and focusing on terrorists rather than state-based threats may seem sensible in the present environment, but the decisions the administration is making will have consequences for decades after it leaves office.

FORBES: Nuclear Weapons: How Few Is Too Few?

China doesn't disclose the size of its nuclear arsenal, but U.S. officials and experts estimate it at around 240 warheads.

WSJ: U.S.-China Nuclear Silence Leaves a Void