have a heart of gold字面意思有一颗金子般的心，真实含义是心地善良；赤子之心。

【例句】
You can trust her. She has a heart of gold.
你可以信任她。她有一颗赤子之心。

Peter has a heart of gold if you give him the chance to prove himself.
如果你给彼得机会证明自己，他其实非常善良心软。