待你长裙落地我必短裙相称
[dài nĭ zhăng qún luò dì wŏ bì duăn qún xiāng chēng]
The translation of this can mean “Once you grow into the person (represented by wearing a long skirt), I will match you in short skirts.” Here it implies a willingness to change along with another person as times change; showing companionship and mutual growth.