Gender roles are an important element in defining individual behavior in society.

His role is to fulfill his responsibilities as a leader.

There is a small radio station in my town.

He sent a distress signal with the radio.

My new wireless telephone is very convenient.

My hobby is amateur radio.

My hobby is amateur radio.

It is important to understand the importance of health.

We have started selling our new products by mail-order and online ordering.

I bought new clothes through mail-order.