To understand what it could mean, we need more information.
Here are some possible interpretations, depending on the context:
* "Good, my...": This is a possible translation if it's part of a longer sentence. For example: "Bueno mi amigo, ¿cómo estás?" (Good, my friend, how are you?)
* "Well, my...": Similar to "Good, my", this could also be a start to a sentence.
* "Good mine...": This could be a translation if "mi" is referring to a possessive pronoun, meaning "mine".
Can you provide the full sentence or more context? That would help me give you a more accurate and helpful translation.