Borderline personality disorder is a Cluster B personality disorder characterized by unstable moods, relationships, and self-identity.
边缘型人格障碍是一种以情绪、人际关系和自我认同不稳定为特征的 B 类人格障碍。
英语百科
Personality disorder
Personality disorders are a class of mental disorders characterized by enduring maladaptive patterns of behavior, cognition, and inner experience, exhibited across many contexts and deviating markedly from those accepted by the individual's culture. These patterns develop early, are inflexible, and are associated with significant distress or disability. The definitions may vary somewhat, according to source.