atavism造句怎么写

If learning and gentility are signs of civilization, perhaps our almost-big brains are straining against their residual atavism, struggling to expand.

One striking example of an atavism is the human coccyx, or tailbone, which is a relic of the mammalian tail.

The first is standstill (fixation), atavism, variation or other disturbances of libido and sexual psychology in the course of recapitulation of development, and acquirement of experiences of climax principally by the mode of infantile sexual behaviors.