My eyes hurt.

This job is a little more difficult than I thought.

Syoku is a kind person.

His back was very broad, giving a sense of strength.

His Japanese ability is improving gradually.

This mutetrahedron plays a very important role in the world of mathematics.

In arid regions, there is little rain, making it difficult for plants to grow.

His movement was very fast.

He exhausted his strength to finish the work.

The committee approved the new project.