心如深海天然冷心如孤街天然冷
[xīn rú shēn hăi tiān rán lĕng xīn rú gū jiē tiān rán lĕng]
Conveys a sense of aloofness and isolation. It suggests a person feels inherently cold inside, likening their feelings to the deep, icy sea or an empty, lonely street at night.