critical region

例句：

1. 1. The scientist has identified the critical region for the new drug's efficacy.
   科学家已经确定了新药有效性的关键区域。
2. 2. The engineer designed a critical region in the circuit to improve efficiency.
   工程师设计了电路中的一个关键区域来提高效率。
3. 3. The team worked diligently to identify and fix the critical region of the software that caused the glitch.
   团队努力工作，识别并修复了导致故障的软件中的关键区域。