Per capita income is a nation’s entire income dividing by the number of people in the nation.

It is large island, few people live there, though

Tucked away in the mountains of Bolivia and Peru, Lake Titicaca are the highest navigable lake in the world.

A mainframe computer is large and is usually used to operate a network of another computers.

There are many different ways of comparing the economy of one nation with those of another

For they, the biggest success was winning the golden prize.

The medical science began with the Greek Hippocrates, who earned for himself the title of father of Medicine

Pigeons, like many migratory birds, read the positions of the Sun and stars in order to orient them

Electronics Superstore has announced that it will have closed early for the upcoming holiday next week

The geology professor showed us a sample about volcanic rock which dated back seven hundred years

It's raining, _______ I can't go to the beach.

Anyone reproducing copyrighted works without permission of the holders of the copyrights are  breaking the law

The sum of all chemical reactions in an organism’s living cells are called its metabolism

Bats use echoes of their own high – frequency sounds to detect food and avoiding obstacles.

AIDS can be transmitted by practicing unsafe sex and receive tainted blood from one who is already infected.

In the last two decades, Bombay and Madras are developed in the centers of the Indian film industry

When a simple action such as lifting one’s arm is performed, the work is divided between at least three different muscle groups.

In a medical study of nearly 5.000 adults, half of them were given one aspirin a day and the other half given a placebo, it was found that those taking Aspirin suffered 38 percent fewer heart attacks than those who weren’t 

The play was very boring, _______ they walked out.

If one has a special medical condition such as diabetes, epilepsy, or allergy, it is advisable that they carry some kind of identification in order to avoid being given improper medication in an emergency.

Malnutrition is a major cause of death in those countries where the cultivation of rice have been impeded by recurrent drought