Watching too much TV can reduce a child's capacity for creative play.

capacity 是名词，来自拉丁语 capacitas，意思是"容纳能力、容量"。在这里引申为"能力、才能"，指一个人能够完成某项活动或任务的内在潜力。capacity for creative play 特指"进行创造性游戏的能力"。