sympathetic nervous system

例句：

1. 1. The doctor explained the symptoms of a sympathetic nervous system disorder to me.
   医生向我解释了交感神经紊乱的症状。
2. 2. The patient's heart rate increased when she was under stress.
   当患者处于压力下时，她的心率会增加。
3. 3. The researcher found that the sympathetic nervous system plays an important role in the body's response to stress.
   研究者发现交感神经系统在身体对应激反应中起着重要的作用。