translation.en: Now, 20th-century psychologists and sociologists were thinking about strangers, but they weren't thinking so dynamically about human relations, and they were thinking about strangers in the context of influencing practices.
translation.zh: 20世纪的心理学家和社会学家 专注于陌生人， 但是他们当年并没有料到人类关系的这种多样性， 而且他们是在实践影响的范畴内 讨论研究陌生人的。