exuberant  
adjective uk/ɪɡˈzjuː.bər.ənt/ us/ɪɡˈzuː.bɚ.ənt/
  (PEOPLE)      
  (尤指人或其行为)精力充沛的,热情洋溢的,兴高采烈的
(especially of people and their behaviour) very energetic
  Young and exuberant, he symbolizes Italy's new vitality. 青春年少、意气风发,他代表了意大利朝气蓬勃的新生力量。 
   (PLANTS)     
 (植物)茁壮的,茂盛的
(of plants) strong and growing quickly