overexcited          
adjective (also over-excited) uk/ˌəʊ.vər.ɪkˈsaɪ.tɪd/ us/ˌoʊ.vɚ.ɪkˈsaɪ.t̬ɪd/
 过度兴奋的
too happy and enthusiastic
  I get absurdly overexcited at Christmas.  每当圣诞节我就变得异常兴奋。 
 The theme park was full of over-excited children. 主题公园里到处都是过度兴奋的孩子。 
  过度活跃的
too active
  The drug is thought to reduce pain by calming overexcited nerve cells. 这种药物据信可以通过让过度活跃的神经细胞平静下来从而减轻疼痛。 
 You may be followed down the street by a swarm of over-excited bees. 大街上,过度活跃的蜜蜂群可能会跟着你飞。 
 - More examples
 - He is not a man to get overexcited about anything.
 - One of the side effects of being a single parent is that you get childishly overexcited when other grown-ups are around.
 - The lack of chloride channels would cause nerve cells to become over-excited.
 - When a person who is dependent on alcohol stops drinking, chemical responses create an overexcited nervous system.