I ate nigorobuna for the first time.

He is writing a thesis on the theory of general relativity.

He always proactively suggests new ideas.

He was working abroad for twelve months.

General relativity is a theory of physics proposed by Einstein.

He solved the problem in a scientific way.

This reaction occurs through a chemical process.

He is good at tactical thinking.

He exercises every day and leads a healthy life.

Fundamental knowledge of mathematics is necessary to solve advanced problems.