你看一晃两三年匆匆又夏天
[nĭ kàn yī huăng liăng sān nián cōng cōng yòu xià tiān]
Loosely based on a Chinese phrase which roughly translates as 'You see, two or three years pass by in a flash and summer rushes back again'. It expresses the feeling of time flying swiftly, reminding people of life's transient beauty.