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.

He measured muscle activity using an electromyograph.

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

I examined muscle activity using an electromyogram.

We should always remember the power of Kannon in difficult times.

The National Security Council was convened to make important policy decisions.

He chose a stable job, saying 'a bird in the hand is worth two in the bush.'

This ancient proverb, 'know the other side and yourself, and you will not be in danger in a hundred battles', teaches us the importance of understanding ourselves and others.