钻心的痛谁懂兮以城空
[zuàn xīn de tòng shéi dŏng xī yĭ chéng kōng]
Translated literally as 'The drilling pain in the heart, who understands, and thus emptiness remains', reflecting a feeling of heartbreak. 'Who understand (who)' refers to the difficulty in finding understanding or empathy from others about their sorrowful feelings.