He participated in the Olympics as a pentathlon athlete.

I have been to Yanbian.

In organic chemistry research, I am thoroughly investigating the characteristics of pendecene.

In organic chemistry class, I learned about the chemical reactions of pentene.

We plan to spend the weekend at the pension.

The shepherd's purse is one of the seven herbs of spring.

I used pentane in a chemistry experiment.

In the old days, samurais always had to be in the vicinity of their lord.

He likes to write short stories.

He flipped the pages of the book.