Her skin is very beautiful.

We installed fire alarms to defend our house against fire.

Retinol has the effect of preventing skin aging.

Aging is an unavoidable natural phenomenon.

Our bodies age day by day.

Her skin is beautiful.

The effect of this medicine appears immediately.

He knows that pain through his own experience.

The moment I touch her skin, I always feel a special emotion.

The greenhouse effect is causing the earth's temperature to rise.