英文书摘精选 鱼喝水吗

Fish live in water, but do they drink it? The answer is yes, but how fish drink water depends on where they live. Water gets into a fish's body through osmosis, the process in which water diffuses from a higher to a lower concentration. For example,

CNN Marketplace 2006-01-26

Rachel Lee: The housing market keeps losing steam. Sales of previously owned homes fell 5. 7% last month according to the National Association of Realtors. If you're looking for a house , the group's

英文书摘精选 Do Fish Drink?鱼儿喝水吗?

Fish do drink water, but how they consume it depends on where they live. Water gets into a fishs body through osmosis, the process in which water diffuses from a higher to a lower concentration. 鱼儿确实喝水，但它们怎样喝水却取决于其

国家地理-2008-05-24 Fuel Cell 聚焦燃料电池

For something that could revolutionize the world, its come along very slowly. The fuel cell was invented in 1839, but there was little development until the 1950s when NASA started to use them in space where they are still used today. Now, after yea

专业术语—口腔生理学术语G2(英文详解)

Glucosamine - a glucose or galactose molecule with an amine group attached. see also glucuronic acid. Glucose - a molecule of great importance to life as it provides a ready source of energy for both

专业术语—口腔生理学术语E2(英文详解)

Enamel prisms - rod-like bundles of hydroxyapatie crystals which are orientated at right angles to the tooth surface. Each prism can be traced from the outside of the enamel all the way to the dentine

专业术语—口腔生理学术语I1(英文详解)

In Vitro - experiments which are carried out in a laboratory as distinct from in vivo experiments In Vivo -experiments which are carried out in live animals as distinct from in vitro experiments Immun

专业术语—口腔生理学术语L2(英文详解)

Lymphocytes - white cells involved in the immune response. B lymphocytes are so called because they mature in bone while T lymphocytes mature in the thymus. Both cells look alike until they recognise

专业术语—口腔生理学术语D2(英文详解)

Dermatan sulphate - a glycosaminoglycan found in skin, tendon, blood vessel and heart valves. Desmosomes -one of the types of cell junctions by which cells join or communicate with each other. Desmoso

专业术语—口腔生理学术语D1(英文详解)

Darwinian medicine - an approach to the treatment of infective diseases which takes account of the co-evolution between the host and its parasite. Deciduous - from the Latin

专业术语—口腔生理学术语C4(英文详解)

Covalent bond - a strong bond between atoms formed by sharing outer electrons. When an atom has 8 outer electrons it is stable. Those which naturally have 8, like neon and argon gasses are quite unrea

专业术语—口腔生理学术语S4(英文详解)

Symbiosis - a mutually beneficial inter-relationship between two organisms, for example between bees and flowers (pollen carrying in return for nectar). Sympathetic nerves - the sympathetic nervous sy

专业术语—口腔生理学术语M3(英文详解)

Morphogenesis - the process in which tissue shapes and organ structures are developed during embryology. Morphogenic fieled - an environment in which the shape or pattern of a developing organ is dete

VOA慢速英语 2008 1014b

VOICE ONE: This is SCIENCE IN THE NEWS in VOA Special English. I'm Barbara Klein. VOICE TWO: And I'm Steve Ember. This week, we will tell about an American study of the brain disorder schizophrenia. We tell about cars that use hydrogen as fuel. And,

VOA常速英语2014--研究发现疟原虫也有致命弱点

Study: Malaria Parasite Has Achilles Heel 研究发现疟原虫也有致命弱点 Researchers say they have found a weakness in the malaria parasite that could lead to new drugs to block infection. The mosquito-borne disease kills more than 600,000 p

英语听力：自然百科 Fuel Cell 聚焦燃料电池

For something that could revolutionize the world, its come along very slowly. The fuel cell was invented in 1839, but there was little development until the 1950s when NASA started to use them in space where they are still used today. Now, after year

Researchers make sperm from stem cell in dish

WASHINGTON, Aug. 4 (Xinhua) -- Researchers have found a way to turn mouse embryonic stem cells into sperm and this finding opens up new avenues for infertility research and treatment, according to astudy published Thursday in the online edition of jo

【英语时差8,16】防臭袜子-下

There are several kinds of odor preventing and odor destroying treatments for textiles. For the most part, they work by killing or inhibiting the bacteria and fungi that cause odors. For example, these socks contain Quaternary Ammonium Compounds, or

英语听书《白鲸记》第686期

but in superlative richness that coating could not possibly have compared with the silken pearl-colored membrane, 不过，就最为豪贵方面说来，那层衣包，却不是那种白珠色的网膜， like the lining of a fine pelisse, forming th

英语听书《白鲸记》第672期

I think that all this indirectly proceeds from the helpless perplexity of volition, 因此，我认为，这种种由于意志纷乱无能而间接产生的现象， in which their divided and diametrically opposite powers of vision must involve them