月亮没了星星太阳少了蓝天
[yuè liàng méi le xīng xīng tài yáng shăo le lán tiān]
If there were no moon, stars, sun, or blue sky, the world would be incomplete. This implies a world lacking something essential or special to the individual. It can represent life without certain important elements, expressing a sense of emptiness or missing someone significant.