atavism

n [U] reappearance in a person of a characteristic or quality that has not been seen in his family for many generations 返祖现象. Cf 参看 throw-back (throw 1).

at that rate, at the back of, at the beginning of, at the best, at the cost of, at the expense of, at the instance of, at the latest, at the mercy of, at the moment, at the rate of, at the same time, at the thought of, at the worst, at this rate, at times, at work, at worst, AT&T, at-home, atavistic, ate, atelier, atheism, atheist, atheistic, Athelney, Athens, athlete, athlete's foot, athletic, athletics, athwart, atishoo, Atlanta, Atlantic, atlas, atmosphere, atmospheric, atmospheric pressure,