He was hiding the fact that he was an illegitimate child.

The tachometer of my car has broken.

I check my step count every day with a pedometer.

Let's use a radiation dosimeter to measure the radiation levels in this area.

I use a pedometer every day to record the distance I walk.

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

He measured muscle activity using an electromyograph.

Common vampire bats are often active at night.

Watching this exciting movie made me feel roused, as if my blood was welling and my flesh was stirring.

There is a proverb that says, 'Plan your day in the morning and your year on New Year's Day,' which means that you should plan your day in the morning and your year on New Year's Day.