1. A camera is a machine for taking photos.2. A stomach is an organ in the body of vertebrates for storing and digesting food.3. A heart is an organ inside the body that serves as a pump to keep the blood circulation throughout the body.4. A computer is a programmable electronic machine that performs high-speed mathematical or logical operations for processing information.5. CD-ROM is a compact disk on which data can be stored and accessed (obtained).6. CT, computerized tomography, is an X-ray machine controlled by a computer system that can take pictures of the body tissue layer by layer.7. Cloning is a technique of producing a copy of an organism without sex; by replacing nucleus of an egg with the nucleus of a body cell from the organism.8. Acupuncture is a Chinese medical practice of piercing parts of the body with needles to treat disease or relieve pain.9. Bacteria are one-celled microorganisms that can be seen only under a microscope. They have no chlorophyll, and multiply by simple division.10. Virus is a kind of organism that is too small to be seen under an ordinary microscope and can only reproduce within living cells. (It consists essentially of a core of RNA or DNA surrounded by a protein coat.)11. AIDS, acquired immune deficiency syndrome, is a disease caused by virus that destroys human bodys defense system and causes various infectious diseases.12. SARS, severe acute respiratory syndrome, is a pneumonia caused by virus on which antibiotics has no curative effect.13. A radio therapy is treatment of illnesses using radition.14. A weather ship is a ship at sea which reports on weather conditions.15. E-mail is a system that allows people to send messages to each other by computer.16. A celluar phone is a telephone that you can carry around with you, that works from a system that uses a network of radio stations to pass on signals.17. Software are programs and other operating information used by a computer.18. Multimedia is, in computer terms, a blending of media types: text, audio, visual, and computer data in one convenient delivery medium19. Potential energy is a kind of energy that is the result of relative position or structure instead of motion, as in a compressed spring.20. Inorganic compounds are substances containing two or more elements that are not animal or vegetable. Most inorganic compounds do not contain carbon and are derived from mineral sources.21. A horseshoe magnet is a piece of iron-attracting metal in a shape of letter U.22. Stainless steel is a type of steel that does not rust.23. A medical thermometer is an instruments used for measuring the temperature of a patient.24. A suspension bridge is a bridge that is hung from strong steel roupes fixed to towers.