Pars flaccida

例句：

1. 1. The doctor examined the patient's pars before giving him medicine.
   医生在给病人开药前检查了患者的部分。
2. 2. The scientist analyzed the pars of the sample for trace elements.
   科学家分析了样本的部分以检测微量元素。
3. 3. The engineer designed a new pars to improve efficiency.
   工程师设计了一个新部分以提高效率。