pars parasympathica

例句：

1. 1. The parasympathetic nerves control the heart's rhythm.
   副交感神经控制心脏的节律。
2. 2.The doctor administered an injection to relieve the patient's pain.
   医生给病人注射了药物以缓解疼痛。
3. 3. During the flight, the parasympathetic system helps us relax and sleep.
   飞行过程中，副交感神经系统帮助我们放松和入睡。