一刀捅入我的心脏让我死心
[yī dāo tŏng rù wŏ de xīn zàng ràng wŏ sĭ xīn]
This is quite a sad phrase expressing intense emotional pain or betrayal. Translating loosely as 'Stab my heart once for me to lose hope', it may refer to the depth of emotional wounds and helplessness.