critical nuclide

例句：

1. 1. The decision was critical for the company's survival.
   这个决定对公司的生存至关重要。
2. 2. The scientist made a critical observation during the experiment.
   科学家在实验中做出了一个关键性的观察。
3. 3. The success of the project depends on the critical factors we have identified.
   项目的成功取决于我们已识别的关键因素。