记忆融为怀念是因为时感情化作乌有是因为强
[jì yì róng wéi huái niàn shì yīn wéi shí găn qíng huà zuò wū yŏu shì yīn wéi qiáng]
A more complex sentence that expresses when memories transform into longing, often due to the passing of time, while strong emotions can sometimes vanish completely leaving only void.