nuclear attack threat

基本解释

For a country as small as Israel, even a small-scale nuclear attack could be an existential threat.
像以色列这样一个小国，即使是一颗小型核弹也足以对其造成威胁。
Today nuclear proliferation and nuclear terrorism have replaced the cold-war-era danger of a large-scale nuclear attack as the most urgent threat to US and global security.
今天核扩散以及核恐怖主义已经取代了冷战时期大规模核打击的危险成为了对美国和全球安全最急迫的威胁。
It is geeky stuff and does not secure the low-grade nuclear isotopes that could be sprayed around in a "dirty bomb"—but it will help combat the threat of a terrorist nuclear attack.
此事有些奇怪，也不能确保“脏弹”周边不会挥散出低级核同位素，但这可以帮助应对来自恐怖分子的核武袭击。

He is expected to press Israel not to carry out its threat to attack Iran's nuclear facilities.
Today's nuclear threat differs from that of the Cold War, according to U.S.Secretary of State Hillary Clinton, "The threat of nuclear war, nuclear attack that we grew up with in the Cold War has diminished.

For a country as small as Israel, even a small-scale nuclear attack could be an existential threat.
ECONOMIST: Conflict in the Middle East
During the Cold War, when the United States faced the threat of a nuclear attack, U.S. administrations made clear that any strike would prompt an all-out retaliation.
NPR: Cyberattack: U.S. Unready For Future Face Of War