spontaneous pain

例句：

1. 1.He experienced spontaneous pain in his shoulder after lifting heavy objects.
   他在举起重物后，肩膀出现了自发的疼痛。
2. 2.She felt a sudden surge of spontaneous pain in her chest.
   她突然感到一阵自发的胸痛。
3. 3.The patient had to endure the spontaneous pain for several hours before he could be moved.
   病人不得不忍受了几个小时的自发疼痛，才能被移动。