返-返

流連忘返

liuˊ lianˊ wangˋ fanˇ

To get lost in the moment | Get/Gets/Getting/Got lost in the moment

流 | 連 | 忘 | 返

一去不返

yiˊ quˋ buˋ fanˇ

Leave for good | Leave and never return

一 | 去 | 不 | 返