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--- Words used in VOA Special English Science Programs
【antibodies】special proteins, produced in the blood, that kill harmful bacteria^抗体
The body's defense system creates different antibodies for each disease it fights.^人体的免疫系统产生各种抗体来对抗各种不同的疾病。
【atom】a very small part of all things; the smallest part of an element that can join with parts of other elements^原子
All matter is made of atoms.^所有物质都是由原子构成的。
【bacteria】living things that are one cell and can be seen only through a microscope; some cause disease^细菌
Some bacteria cause disease.^有些细菌会引起疾病。
【cell】a small mass of living material that is part of all plants and animals^细胞
All plants and animals are made of cells.^所有的植物和动物都是由细胞构成的。
【chromosome】a line of genes; most human cells contain 46 chromosomes^染色体
Chromosomes carry the genes that make each of us different.^染色体携带可以区分每个人的基因。
【compound】a substance containing two or more elements^混合物，化合物
A compound contains two or more chemical elements.^化合物包含两种或更多的化学元素。
【dense】close together; thick^密集的，浓厚的
Lead is a dense material.^铅是一种密度大的物质。
【electron】a small part of an atom that has an electrical force^电子
An electron is a small part of an atom.^电子是原子的一个小部分。
【element】one of more than 100 substances known to science that cannot be separated into other substances^元素
An element cannot be separated into other substances.^元素不能裂变为其他物质。
【enzyme】a special kind of protein; it produces changes in other substances without being changed itself^酶
An enzyme can change other substances without being changed itself.^酶能改变其他物质，而自身不会发生变化。
【fetus】unborn young^胎儿
A human embryo becomes a fetus after eight weeks.^人类胚胎在八周后长成胎儿。
【fission】a splitting; in atomic fission, the nucleus of an atom is split to produce nuclear energy^(原）裂变
Nuclear fission splits atoms to produce energy.^原子裂变使原子分裂产生能量。
【fusion】a joining together; in atomic fusion, atomic particles are joined together to produce nuclear energy^（核子）融合
Nuclear fusion joins atoms to produce energy.^核子融合将原子结合起来产生能量。
【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^（遗传）因子，（遗传）基因
Genes in the cell control the growth and development of living things.^细胞中的基因控制生命体的生长和发育。
【genetic engineering】the science of changing the genes of a living thing^遗传工程
Genetic engineering changes the genes of a living organism.^遗传工程改变了生物有机体的基因。
【gravity】the force that pulls things toward the center^地心引力，重力
Gravity is the force that pulls things toward the center.^重力将物体拉向重心。/引力将物体吸引到中心。
【image】a reproduction of the appearance of a person or thing^图像，肖像
An image is a picture of someone or something.^图像就是人或物的图画。
【laser】an instrument that makes a thin, powerful light^激光
A laser makes a thin, powerful beam of light.^激光能产生细小但很强的光束。
【magnet】a piece of iron or other material that has a pulling force; this pulling force is called magnetism^磁体，磁铁
A magnet pulls on objects of iron or steel.^磁体牵引铁或钢等物体。
【molecule】the smallest amount of a chemical substance that can exist^分子
A molecule is the smallest part of a chemical substance.^分子是化学物质的最小的部分。
【nerve】a thin piece of tissue that sends information through the body to and from the brain^神经
Nerves carry information between the brain and the other parts of the body.^神经把大脑中的信息运送到全身各个部位。
【nucleus】the center part of an atom or cell^核子
The nucleus is the center part of an atom or cell.^核子是原子或者细胞的核心部分。
【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)^核酸
A molecule of nucleic acid holds the genetic information necessary for life.^核酸的分子存有生命所必需的遗传信息。
【nutrient】a food or substance that makes plants, humans or animals grow^营养品，营养物
Food is a nutrient that makes humans and animals grow.^食品是一种能使人和动物生长的营养物。
【organ】a part of the body that has a special purpose, such as the heart or brain^器官
The heart and the brain are organs.^心脏和大脑都是器官。
【organism】a living thing, often so small it can be seen only through a microscope^生物体，有机体
An organism is a living plant or animal of any size.^有机体是任何大小的有生命的植物或动物。
【particle】a very small piece of matter^粒子
A particle is a very small piece of matter.^粒子是一团非常微小的物质。
【proteins】substances responsible for the growth of tissue and for fixing damaged tissue^蛋白质
Proteins fix damaged tissue and help tissue grow.^蛋白质修复损伤的组织，帮助组织生长。
【robot】a machine that moves and performs tasks^机器人
A robot is a machine that moves and does work.^机器人是一种能走动，能干活的机器。
【tissue】living material; a group of cells that are similar in appearance and do the same thing^组织
Tissue is a group of living cells.^组织是一群活的细胞。
【virus】a kind of organism that causes disease^病毒
A virus is a tiny organism that invades cells and causes disease.^病毒是一种微小的生物体，它可能会侵袭细胞，引起疾病。
【x-rays】a kind of radiation that can pass through most solid materials, often used in medicine^x光
X-ray radiation is used to make images of bones and tissue for medical purposes.^x光放射在医学上用来拍骨头和组织的图像。
--- Organs of the body
【breast】^乳房
The breast produces mother's milk to feed a baby.^乳房产生母乳哺育婴儿。
【heart】^心脏
The heart pumps blood through the body.^心脏运送血液到全身。
【intestines】^肠子
The intestines are tubes through which food passes after it is broken down in the stomach. Part of the intestines also remove solid wastes from the body.^食物在胃里消化之后，到达肠道。肠的一部分也会移走身体内的固态废物。
【kidney】^肾脏
The kidneys clean wastes from the body.^肾脏清洗掉身体中的废物。
【liver】^肝脏
The liver makes some proteins and enzymes. It also removes poisons from the blood.^肝脏制造蛋白质和酶，还排除血液中的毒素。
【lung】^肺
The lungs take in and expel air from the body.^肺吸进空气，并把身体内的空气排出。
【prostate】^前列腺
The prostate is a part of the male reproductive system.^前列腺是男性生殖系统的一部分。
【stomach】^胃
The stomach breaks down food for the body to use.^胃消化食物，以供身体吸收。
【uterus】^子宫
The uterus is a part of the female reproductive system where a fetus develops.^子宫是女性生殖系统的一部分，胎儿在那里发育。
--- Common Expressions
【a lot of 】much or many.^许多的
We had a lot of rain.^我们这里雨水很多。
【carry out】to do; to put into effect.^实现，执行
Please carry out the plan.^请执行那项计划。
【pass a bill 】approve.^通过议案
Congress is expected to pass a bill to cut taxes.^希望国会能通过减税的议案。
【take steps 】to start to do something.^采取措施
The government will take steps to halt inflation.^政府将采取措施中止通货膨胀。
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