100Test:VOA特别英语节目官方词汇表汇总Y-Z

文章作者 100test 发表时间 2008:07:01 10:08:47
来源 100Test.Com百考试题网

　　Y

　　 year - n. a period of time equal to twelve months

　　 yellow - ad. having the color like that of gold or the sun

　　 yes - ad. used to express agreement or to permit

　　 yesterday - n. the day before today

　　 yet - ad. at some time before now ("Have they arrived yet?"). now. at this time ("I cannot tell you about it yet."). conj. however ("The sun was shining, yet it was cold.")

　　 you - pro. the person or persons being spoken to

　　 young - ad. in the early years of life. not old

　　 Z

　　 zero - n. the number meaning none or nothing

　　 zoo - n. a place where animals are kept for the public to look at and study

　　 COMMON PREFIXES

　　 dis - not (dishonest, disobey)

　　 pro - for, supporting (pro-labor, pro-government)

　　 re - to do again (reorganize, reunite)

　　 self - used to show that the person or group acting is the one affected by the action, or to show that the action is done only by its own effort or power (self-declared, self-appointed)

　　 un - not (unusual, unhappy)

　　 COMMON EXPRESSIONS

　　 carry out - to do. to put into effect ("Please carry out the plan.")

　　 pass a bill - approve ("Congress is expected to pass a bill to cut taxes.")

　　 take steps - to start to do something ("The government will take steps to halt inflation.")

　　 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