He is working hard to complete his doctoral dissertation.

In biochemistry, sucrose is a type of sugar.

We chose the shortest route.

The Russian Federation is the country with the largest land area in the world.

Charlotte is my best friend.

His dog has brown fur.

This project requires a lot of work.

He was drinking cola with a straw.

The centromere is a part of the chromosome and plays an important role during cell division.

The statue of Fukurokuju symbolizes wealth and longevity.