我通常在饭后大约半小时去游泳.（是不是应该加上饭后?）
I usually go to swim about half an hour after meal.
generally I go to swim half an hour or so after meal.
normally I go swimming approximately half an hour after meal.
我通常在饭后大约半小时去游泳.（是不是应该加上饭后?）
I usually go to swim about half an hour after meal.
generally I go to swim half an hour or so after meal.
normally I go swimming approximately half an hour after meal.