He was standing behind me.

He is as strong as an ox.

Telescopium is one of the constellations in the southern sky.

Microscopium is one of the constellations in the southern sky.

Octans is one of the constellations in the southern sky.

Octans is one of the constellations in the southern hemisphere.

Alpha Centauri, in the constellation of Centaurus, is the closest star to Earth.

In organic chemistry, the concept of conformational isomers is very important.

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.

He is in mourning for his father.