In chemistry class, I learned about alkanes.

Alkynes play a very important role in organic chemistry.

Alkenes, also known as olefin hydrocarbons, play an important role in organic chemistry.

Alkenes play a very important role in organic chemistry.

He picked up the whip and started practicing.

Functional analysis is a branch of mathematics that studies the properties of functions in infinite-dimensional spaces.

I studied linear algebra at university.

Mr. Koza puts pepper on everything.

Takako is my best friend.

In this map, the terrain of Hensuu is detailedly depicted.