Translation:You are a woman and I am a boy.
German distinguishes between formal and informal second person pronouns ("you").
You would use the informal pronouns (du for one person, ihr for several) when speaking to children, good friends, your family, or other people you are fairly close to. Roughly, if you would call them by their first name. Also, if you're in your early 20s, you would often call others of the same age by informal pronouns even if you don't know them.
You would use the formal pronoun Sie with others: adults whom you don't know; your boss and other superiors; your teacher; and so on. Basically, people whom you treat politely and/or with respect because you are not "close" to them socially. People whom you would usually call by their family name.
Using Sie as a polite form of "you" is taught later in the official course.
However, this sentence was added by Pearson editors for their course and is unfortunately also visible to all learners, even though the polite you, Sie, hasn't been introduced officially at this point yet.