Our families have been intermarrying for a long time.

He set up the detonator.

He detonated the bomb.

He lectured to the students.

I will attend the lecture held at the university today.

This chemical substance volatilizes immediately when it gets hot.

In this chemical reaction, volatile substances are produced.

There are several thousand books in this library.

She fractured her pubis.

He adjusted the position of the hyoid bone to improve the quality of his voice.