有你在身边最是温暖你不在身边最是寂寞
[yŏu nĭ zài shēn biān zuì shì wēn nuăn nĭ bù zài shēn biān zuì shì jì mò]
Means 'When you're by my side it is warm; when you're not by my side it is loneliness'. It vividly describes the warmth brought by companionship as well as the loneliness experienced when they are not around.