She said the nuclear deal will trigger an expansion of their ties.

她说，这项核协定将推动两国关系扩大。

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"I firmly believe it is in Iran's interest not to develop nuclear weapons, because it would trigger a nuclear arms race in the Middle East and be profoundly destabilizing in all sorts of ways."

VOA: special.2009.05.23

Officials said that they saw little need to hurry what was a sensitive and complex process because there was a de facto command authority in place, with the prime minister, Atal Behari Vajpayee, in charge of the nuclear trigger.

ECONOMIST: Controlling the nuclear decision

Mr. SIEGFRIED HECKER (Former Director, Los Alamos National Laboratory): The bottom line of the Non-Proliferation Treaty--in fact, of the proliferation world--I think, could be simply stated by the more fingers on the nuclear trigger, the more dangerous a world it is for everyone.

NPR: Nuclear Weapons Gain Importance for Regional Powers

Fires at nuclear facilities are often the trigger for nuclear catastrophes.

FORBES: New York City's Deadly Game of Nuclear Roulette