He took a little pause before speaking.

This cell is dividing very actively.

The parasympathetic nervous system helps our body to relax and conserve energy.

There is a deep bond between him and me.

I was friends with her for 10 years.

There is a secret between him and me.

Please contact the person in charge.

My doctor in charge is very excellent.

The air in this area is greatly affected by pollutants emitted from factories.

The existence of dark matter has not yet been fully proven.