In an overcrowded world, people are less willing to accept the diversity of others and more prone to see others as a threat to their own identity.
在一个人口过度拥挤的世界里,人们不太愿意接受他人的多样性,更容易将他人视为对自身身份的威胁。
两个物体的相互作用力总是大小相等,方向相反,同时出现或消失且作用于同一直线上。