Often slow and insidious changes, undetected, happening secretly, out of sight.
便濫了.便濫了便濫了便濫了便濫了便濫了便濫了便濫了便濫了便濫了便濫了便濫了便濫了便濫了便濫了便濫了便濫了便濫了便濫了便濫了便濫了便濫了便濫了便濫了便濫了便濫了便濫了便濫了便濫了便濫了便濫了便濫了便濫了便濫了便濫了便濫了便濫了便濫了便濫了便濫了便濫了便濫了便濫了便濫了便濫了便濫了便濫了便濫了