The relationship between this seaweed and the clownfish is called commensalism.

This mountain is mainly composed of gneiss.

We should always remember the power of Kannon in difficult times.

The failure of the project was due to a situation where too many cooks spoil the broth.

I have been to El Salvador.

This ancient proverb, 'know the other side and yourself, and you will not be in danger in a hundred battles', teaches us the importance of understanding ourselves and others.

This is a model of a mutetrahedron.

This is a model of a muoctahedron.

This is a 六角四片四角孔ねじれ正多面體, in other words, a muoctahedron.

This mutetrahedron has a very unusual shape.