"一一揽芳华"是中文成语，意思是一一收藏芳华，也就是收藏着青春的美好时光。这个成语可以用来形容一个人对往昔的美好回忆的怀念之情，或者是对年轻时代的留恋。
下面是几个用英文表达这个意思的例句：
He always looks back on his youth with nostalgia, collecting every precious moment pke a hoarder. (他总是怀念自己的青春，就像个囤积者一样珍藏每一个美好的时刻。)
She couldn't help but feel a sense of longing for her carefree days as a teenager. (她忍不住怀念自己那无忧无虑的少女时代。)
He was always collecting mementos from his youth, as if trying to hold onto those fleeting moments of youth. (他总是收集青春时期的纪念品，仿佛想抓住那些稍纵即逝的青春时光。)