It is reported that North Korea has conducted another underground nuclear test.

It is reported that North Korea has conducted another nuclear bomb test.

He is spending a lot of time on experimental research.

His opinion had a big influence on my decision.

That news greatly influenced his opinion.

He is my best friend.

He is my best friend.

His goal was truly a miracle play.

In physics, the study of the 'nucleus' at the center of an atom is important.

We conducted a new experiment in science class.