Guāng yīn rěn rǎn, dāngnián de tóngxué gè bēn dōngxī.
As the years drifted on, our old classmates scattered in all directions.
Tips
usage
荏苒 is the specific word for time slipping away imperceptibly — subtler than 光阴似箭 (time like arrows). Use 光阴荏苒 for quiet reflection on years passing; use 光阴似箭 for shock at how fast they went.
