All seems lost, but then Bruce Willis sacrifices his own life to detonate a thermonuclear bomb on the asteroid.

似乎一切都会毁灭，但随后布鲁斯·威利斯牺牲了自已的生命，在小行星上引爆了一枚热核炸弹。

" … This fusion is explosive, and the micronova occurs: a thermonuclear 'bomb' goes off, " said astronomer Paul Groot who helped write the study.

天文学家保罗·格鲁特帮助撰写了这项研究报告，他说：“这种融合是爆炸性的，并且发生了微小变化——一个热核‘炸弹’爆炸。”

It was a fusion nuclear pulse rocket, propelled by thermonuclear bombs detonated inside a small magnetic field.

这是一枚聚变核脉冲火箭，由在小磁场内引爆的热核炸弹推动。

The U.S. soon graduated from fission weapons to thermonuclear bombs which combined fission and fusion to release even more energy.

美国很快就从裂变武器升级为结合裂变和聚变来释放更多能量的热核炸弹。