Both his parents used "hard times" to describe that period. Some people pointed out that the difference in vocabulary illustrates the difference between folk discourse and academic elite discourse. This explanation is a bit bookish. In my opinion, this difference in vocabulary reflects "personal feeling." That is, for those who are going through the Great Depression, they have no time to care that they are living in a period that will be repeatedly cited by historians in the future. The oppression of the general environment to them is just an instinctive feeling. They are going through their own "hard times." For themselves, it means the danger of unemployment, frugality, loss of cars and houses, concerns about safety and security, and a decline in status. What we need to pay attention to today is that if we really take social psychology as the basis for our actions, by the time the public gains a personal sense, everything may be a step too late.