My grandfather is already sixty years old.

My grandfather is already sixty years old.

He has been living in this town for several decades.

He drew a decagon shape.

My pet Bengalese finch is very cute.

We have been working on this project for ten months.

This 'enkanabachi' is a very rare type of bee.

Please teach me how to calculate the excircle of this triangle.

I bought a new notebook at the 100-yen shop.

I am deeply interested in the teachings of the Japanese Tiantai.