A human being is a soft, weak creature. It needs constant supplies of air, water, and food. It has to spend a third of its life asleep, and it cant work if the temperature is too hot or too cold. But a robot is made of strong metal. It uses electrical energy directly, never sleeps, and can work in any temperature. It is stronger, more efficient - and sometines more human than human beings. Oxford Bookworms Library (1800 headwords). Anglický text