Life is a series of ups and downs.

He does his work perfectly, dotting the i's and crossing the t's.

Let's cherish every encounter with the spirit of 'once in a lifetime'.

The National Research and Development Agency plays a crucial role in advancing science and technology.

He is interested in phrenology.

He is interested in ancient mathematics.

I am majoring in parasitology at university.

Cartography is an important field of study for visually representing geographic information.

He is majoring in metallurgy at university.

He is an expert in oceanography.