core section

例句：

1. 1. The engineer carefully analyzed the core section of the machine to identify any potential issues.
   工程师仔细分析了机器的核心部分，以识别任何潜在的问题。
2. 2. The scientist conducted a core section analysis to understand the chemical reactions taking place in the sample.
   科学家进行了核心部分分析，以理解样本中发生的化学反应。
3. 3.In the construction of a bridge, the core section is where the main support beams are located.
   在建造桥梁的过程中，核心部分是主支撑梁所在的位置。