The subject is out of his sphere.

Source: Tatoeba

The interviewer introduces the topic of the interview.

Source: Tatoeba

I am familiar with this subject.

Source: Tatoeba

I chose this topic because I think it is interesting.

Source: Tatoeba

It's not a suitable topic for discussion.

Source: Tatoeba

I'm playing a medieval-themed PC game.

Source: Tatoeba

Let's find sentences with new vocabulary on this topic, add them to the following list: _____; and translate them.

Source: Tatoeba