He engaged in an extravehicular activity from the spaceship.

Einstein proposed the theory of relativity.

He is an expert in theoretical physics.

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.

This park was completely artificially made.

She is looking for an ideal partner.