His movement was very fast.

Jin will exert himself for the success of this project.

There is not a single cloud in the sky.

This is a model of a mutetrahedron.

This mutetrahedron has a very unusual shape.

He has a weak body and gets sick easily.

We decided to explore the cave.

There were many people gathering, and the park was bustling.

He was exposed to radiation in a nuclear accident.

He is good at playing the character of Sao.