This is the whole point. While in isolation, A generally translates to A' and B to B', it doesn't mean that it can always be used that way.
In translations you'll often get situations where A should be translated to B' in that context (even if in the original language B wouldn't be used there), in order to transfer the concept properly. Literal translations often end up weird, and sometimes completely wrong.
In translations you'll often get situations where A should be translated to B' in that context (even if in the original language B wouldn't be used there), in order to transfer the concept properly. Literal translations often end up weird, and sometimes completely wrong.