一望两三年匆匆又夏天
[yī wàng liăng sān nián cōng cōng yòu xià tiān]
'Gazing into the distance, it has already been two or three years, yet summer has come again so swiftly.' This implies a feeling of time flying by and the cyclic nature of seasons, while also suggesting reminiscence or nostalgia for past summers.