That's because the experience of long-term isolation can paradoxically lead to social withdrawal.

那是因为长期孤立的经历会自相矛盾地导致社交退缩。

It can also be social withdrawal, when an animal just takes himself or herself away from friends and stays by themselves, or a failure to eat or sleep properly, sometimes a depressed posture or vocalization.

也可能表现为不合群，即一只动物离开朋友们并独自生活，或不能正常进食或睡眠，有时做出沮丧的姿势或悲鸣。