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[something is] not surprising. No wonder the baby is crying. She's wet. It's no wonder that plant died. You watered it too much.
(it's) no wonder
it is not surprising It's no wonder ticket prices are so high when you see what the players are being paid. No wonder I couldn't find my keys! They were in the car all along.Opposite of: it's a wonder
Also, small wonder. It's not at all (or hardly) surprising, as in With the goalie out with a sprained ankle, it's no wonder you lost the game, or If he finished off all of the turkey, small wonder he has a stomachache. [c. a.d. 900]