你是我一生未做完的梦你是我一生未唱完的歌
[nĭ shì wŏ yī shēng wèi zuò wán de mèng nĭ shì wŏ yī shēng wèi chàng wán de gē]
These lines express the speaker's feeling of something being incomplete or left undone, like a dream that was never realized or a song that was interrupted and can't be finished.