The students on a field trip visited the museum.

He was hiding the fact that he was an illegitimate child.

He went to America as an international student.

He is working at a school as a student teacher.

That high school girl studies in the library every day.

This ring is made of alexandrite.

We visited a bauxite mine.

We believe that we are connected by the red thread of fate.

In this old book, the character '緖' is used.

He tied the luggage tightly with twine.