情侣是夏天的心脏
[qíng lǚ shì xià tiān de xīn zàng]
Translates to 'Lovers are the heart of summer', it uses imagery that highlights how essential and lively couples appear during warm summertime. This kind of saying portrays the significance lovers have within someone's life - like how a beating heart keeps a living organism going strong. Thus, the nickname suggests that loving relationships bring vigor and excitement especially when linked with seasons full of energy.