你眼似深海却不是为我蔚蓝
[nĭ yăn sì shēn hăi què bù shì wéi wŏ yù lán]
Using metaphor and contrast, this sentence describes someone's eyes resembling a mysterious ocean, implying their profound allure or hidden feelings. However, the latter half indicates the sadness of knowing these beautiful things do not belong to the beholder.