He was the first author of the paper.

He is recognized as the top person in that field.

In physics, blackbody radiation is a very important concept.

I am planning to go to Los Angeles next week.

This new software provides seamless integration.

He is attending school to obtain a motorcycle license.

To measure your underbust size, you measure around the lower part of your chest with a tape measure.

That joke is hilarious, isn't it?

He retracted his previous remarks.

Tsuge-san is my best friend.