(of a person) the state of having more energy than is normal, becoming excited easily, and being unable to stay still or think about work: 过分活跃的；多动的
Their son has been diagnosed with a hyperactivity disorder.
He uses a sedative to control his hyperactivity.
adjective
hyperactive
(especially of children and their behaviour 尤指儿童及其行为) too active and only able to keep quiet and still for short periods 过分活跃的；多动的