为促成一次核爆炸，临界质量必须在一百万分之一秒内聚集在一起。

In order to make a nuclear explosion, the critical mass must come together within a fraction of a millionth of a second.

虽然当天有许多人参与冥想，但是人数远不足以达成临界质量。

Although many people participated, we were far from achieving the critical mass.

它几乎像是你们到达了临界质量而激活了第一百只猴子理论。

It is almost as if you have reached critical mass and the Hundredth Monkey Theory is activating.

同时还需要足够多的、可裂变的原子核用于中子进行撞击，换句话说，需要一个临界质量。

There also need to be enough fissionable atoms about for the neutrons to bumpinto—in other words, a critical mass.

应用临界滑移场技术，对排土场边坡进行临界滑动面搜寻。

The critical sliding field technology was used to probe the sliding surface of a waste-dump slope.