Mr. Naranawa is my best friend.

He is good at playing the sax.

I bought a new pair of slacks.

The doctor measured my pulse rate.

He picked up the scramasax and checked its sharpness.

Economics is a field of study that researches the allocation of societal resources.

He deeply understands the national characteristics of Japan.

I haven't paid this year's tax yet.

She said 'thanks' with a smile.

In geology, the study of tectonics is important for understanding earthquakes and volcanic activity.