He is world-famous as an astronomer.

This experience is something I should carve into my bones and engrave in my liver.

My new keyboard makes typing very enjoyable.

He chose to discard the shadow for the substance.

We visited a bauxite mine.

He is majoring in electrical engineering.

He is undergoing electrotherapy for his back pain.

It's difficult to understand the principles of electrooptics.

My father is an ichthyologist and has a deep knowledge about marine life.

The chances of him winning are a hundred to one.