Detailed Instructions: In this task, you need to translate the given English sentence to Polish language.
Problem:and would - could - or might therefore mean a great leap forward for mankind.
Solution:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
a więc będzie – albo może być – wielkim krokiem dla ludzkości.