空气是丢不掉的命
[kōng qì shì diū bù diào de mìng]
'Air is the life you cannot lose' indicates air is an indispensable part for life, hinting at the preciousness or irreplaceability of something essential which supports or maintains oneself. The meaning could expand beyond material necessities to things we need for our mental well-being such as companionship or support.