Watching a movie alone is enjoyable.

He searched for a flashlight in the darkness.

The photoelectric effect is a phenomenon where a material emits electrons after absorbing light.

An electrooculogram is a test method to record the movement of the eyeball.

The doctor used an electrocardiograph to check the condition of my heart.

He measured muscle activity using an electromyograph.

I examined muscle activity using an electromyogram.

Mr. Sawa visits the nearby marsh on his daily walks.

While climbing the mountain, we found a beautiful mountain stream.

It's difficult to get a strike in bowling.