医生给俄换个更坚强的心脏
[yī shēng jĭ é huàn gè gèng jiān qiáng de xīn zàng]
In this case, the character '俄' stands for 'I'. It's a plea for resilience, metaphorically asking a doctor to replace one's heart with a stronger one, signifying a hope or need to be braver and more resilient in facing challenges.