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应用生物学 Applied Biology 医学技术 Medical Technology 细胞生物学 Cell Biology 医学 Medicine 生物学 Biology 护理麻醉学 Nurse Anesthesia 进化生物学 Evolutionary Biology 口腔
The Nautilus adopted an average speed of twenty-six miles per hour, the speed of an express train. 诺第留斯号这时的速度是每小时二十六海里的中常速度,即特别快车的速度。 If it kept up this pace, forty hours would do it
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
Vaccine - a planned exposure to an antigen in order that memory B lymphocytes can retain a memory for it. In practice the organism carrying the antigen is either killed or modified so that it does not
Nerve growth factor- a cytokine that promotes the growth and repair of sensory nerves and maintenance of sympathetic nerves. Neural crest cells - cells derived from the ectoderm layer in the embryo. T
Paracrine - cell messengers also called cytokines which are locally acting, produced by neighbouring cells or the extracellular matrix, as distinct from as distinct from endochrine or hormonal messeng
pH - a measure of how acid or alkali a solution is. As the pH gets lower, the solution is more acid. At a pH of 7 the solution is neither acid nor alkali. pH is the inverse of the logarithm of the con
Polymers-large molecules made up of many joined units of a more simple molecule. Examples are polysaccharides and polypeptides. Polypeptides; -chains of amino acids joined by peptide bonds. They are n
Prostaglandins - are members of a class of hormones known as the eicosanoids. They are released by cells which have been damaged and have a powerful ability to sensitise nerve endings causing tenderne
Saturated solutions - Salts such as the apatites do not readily become ionized and dissolve in water. When no more ions can dissolve the solution is said to be saturated. The concentration of ions in
Planktonic - a form of life style in which an organisms floats freely in a fluid without significant attachment or association with other living forms. Plaque is a film of bacteria in a matrix of sali
In general when we refer to a theory we mean something that's not proven yet. In science it's different, as Yael and Don discuss in this Moment of Science. Y: Today, on A Moment of Science, we clear up the difference between a scientific theory and a
Every week millions of Britons use computers to access the internet but how many of them actually know their ipods from their IMs? Not many it seems. A recent survey from Nielsen/ NetRatings a global internet, media and market research company - show
A Tour of Homes. Welcome back to our tour where we discover each and every room and object in the home. Remember, if you can learn and remember this vocabulary, you will have the advantage of being able to use words and phrases that make you sound na
射箭 archery 可调整箭台 adjustable 箭 arrow 向前一步 弓箭步 advance junge 箭筒 arrow carrier 瞄准引导器 a guide for marking 箭袋 arrow case 瞄准基线 alignment 靶垫 boss 分
今天我们要讲常会用在总统大选的竞选活动中的几个习惯用语。在人们从事的各种各样的活动中,体育运动为我们日常使用的语言所提供的习惯说法可能最多。比方说,我们今天要学的几个习
We are stopping. The ground marshaller is still guiding us in, but I think my engine will hit the boarding bridge if we taxi any further. 761. 我们停止了。地面信号员仍引导我们滑入,但我认为如果我们再滑入,我们的发动机
We made a very hard landing. Well need maintenance inspection before our next flight. Suggest you check the runway touchdown zone. 781. 我们重着陆了。下次飞行前我们需要机务检查。建议你们检查跑道接地区。 The center of
Ice is accumulating rapidly on the wings and fuselage. Request emergency descent to 6000 feet. 701. 机翼和机身的积冰速度很快。申请紧急下降到6000英尺。 We are encountering moderate icing. Request immediate descent. 702. 我们遇到