minimum critical mass

例句：

1. 1. The spacecraft's fuel tank must be filled to the minimum critical mass before launch.
   在发射前，宇宙飞船的燃料罐必须充满到最小临界质量。
2. 2.The researchers found that the minimum critical mass for a chemical reaction is usually higher than the actual amount of reactants.
   研究人员发现，化学反应的最小临界质量通常高于实际反应物的量。
3. 3. The scientists have determined the minimum critical mass required for the experiment, which will determine the outcome of the experiment.
   科学家们已经确定了实验所需的最小临界质量，这将决定实验的结果。