We need to calculate the aggregation number of this compound.

The discussion about the regional system in Japan is not over yet.

Could I have a receipt, please?

He is in the third year of junior high school, or in other words, he is in the 9th grade in school years.

Epidemiology is the science that studies the occurrence and spread of diseases.

I am majoring in political science at university.

I am majoring in physiology at university.

He likes going to chamber music concerts.

He has a deep interest in numismatics.

He is learning the basics of elementary learning.