Reading clefs is difficult.

The bass clef is one of the basic elements of music.

He is an expert in semiotics, and his theories are very profound.

What does this masu symbol mean?

This text is organized using section signs.

Semiotics is the study of signs and symbols used in society and culture.

What does this at sign mean?

The Schläfli symbol is a part of geometry, used to represent the shape of polyhedra.

We respect Japanese culture.

We are going on a trip tomorrow.