一个人孤单地降落拥挤得只剩下寂寞
[yī gè rén gū dān dì jiàng luò yōng jĭ dé zhĭ shèng xià jì mò]
Expresses the feeling of landing alone and finding oneself alone even among crowds. This shows the deep solitude felt by the person amidst others, representing existential loneliness.