I can't understand this sign's meaning.
There are several explanations for what this symbol means.
I can't understand this sign's meaning.
I don't know what this indicates.
I don't know what this symbol stands for.
I don't know what this means.
I don't know what that is pointing out.
What is this a sign for?
I don't know the meaning of that.
I don't understand the meaning of this word.
I can not get at the meaning of this passage.
I can not get at the exact meaning of the passage.
I don't understand what this means.
I don't know the meaning of this word.
I don't know where this expression comes from.
I don't understand the nuance of this.
This code is similar to that code.
I can't understand the meaning of this word.
I don't understand the meaning of this word.
I know what that means.
This is a proverb that I don't understand.