VOA Special English 基本词汇

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·Parts of speech ·Common Prefixes ·Common Expression ·Organs of The Body
·Words Used in VOA Special English Science Programs

Words Used in VOA Special English Science Programs

atom - a very small part of all things; the smallest part of an element that can join with parts of other elements

bacteria - living things that are one cell and can be seen only through a microscope; some cause disease

cell - a small mass of living material that is part of all plants and animals

chromosome - a line of genes; most human cells contain 46 chromosomes

compound - a substance containing two or more elements

dense - close together; thick

electron - a small part of an atom that has an electrical force

element - one of more than 100 substances known to science that cannot be separated into other substances

enzyme - a special kind of protein; it produces changes in other substances without being changed itself

fetus - unborn young

fission - a splitting; in atomic fission, the nucleus of an atom is split to produce nuclear energy

fusion - a joining together; in atomic fusion, atomic particles are joined together to produce nuclear energy

genes - parts of cells that control the growth and development of living things; genes from the mother and father are passed to the child; genes contain nucleic acid

genetic engineering - the science of changing the genes of a living organism

gravity - the force that pulls things toward the center of the earth

image - a reproduction of the appearance of a person or thing

laser - an instrument that makes a thin, powerful light

magnet - a piece of iron or other material that has a pulling force; this pulling force is called magnetism

molecule - the smallest amount of a chemical substance that can exist

nerve - a thin piece of tissue that sends information through the body to and from the brain

nucleus - the center part of an atom or cell

nucleic acid - a molecule that holds the genetic information necessary for life; there are two kinds of nucleic acid: DNA (deoxyribonucleic acid) and RNA (ribonucleic acid)

nutrient - a food or substance that makes plants, humans or animals grow

organ - a part of the body that has a special purpose, such as the heart or brain

organism - a living thing, often so small it can be seen only through a microscope

particle - a very small piece of matter

proteins - substances responsible for the growth of tissue and for fixing damaged tissue

robot - a machine that moves and performs tasks

tissue - living material; a group of cells that are similar in appearance and do the same thing

virus - a kind of organism that causes disease

x-rays - a kind of radiation that can pass through most solid materials, often used in medicine