zhè / méi / niè / bì / suī / rán / bù / zhí / qián / què / shì / yé / ye / nián / qīng / shí / liú / xià / de / jì / niàn / pǐn

这枚镍币虽然不值钱，却是爷爷年轻时留下的纪念品。

Although this nickel coin is not valuable, it is a keepsake left by Grandpa from his youth.