We are often forced to study until about thirty years of age, and it really seems like a never ending story.

never 是副词，意思是"从不、永不"，表示否定或拒绝。 ending 是动词 end 的现在分词形式，end 的意思是"结束、终止"。 never ending 组合起来表示"永无止境的、永不结束的"，用来形容持续不断、看不到尽头的事情。