Significados de gradual acquirement en inglés

The gradual acquirement of the erect position by the human infant admirably repeats this long phylogenetic evolution.

In this gradual acquirement, by infants, of the habit of laughing, we have a case in some degree analogous to that of weeping.

People often talk of the long apprenticeships served by instinct, of its gradual acquirements, of its talents, the laborious work of the ages.