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英语科普类文章

学习啦【英语文摘】 编辑:韦彦 发布时间:2016-08-29

  科普教育对我国小康社会、和谐社会的建设有着重要的意义。下面是学习啦小编带来的英语科普类文章,欢迎阅读!

  英语科普类文章1

  听点小音乐 轻松学分数

  Stuck on a tricky math problem? Start clapping. Grade school kids who learned about fractions through a rhythm-and-music-based curriculum outperformed their peers in traditional math classes. The work is inEducational Studies in Mathematics.

  被一条数学题难住了?拍拍手试试吧。研究表明,小学生在有节奏感的音乐背景下学习分数知识的效果会好于传统课堂(具体研究发表在《数学教育研究》上的《学术性音乐:如何用音乐辅助三年级小学生学习基础分数》一文,作者:苏珊·科瑞等)。

  Fractions let you divide up a measure of music into notes of varying length. For example, one four-beat measure could contain a single whole note held for all four beats, two half notes of two beats apiece, four quarter notes of a beat each, and so on. In the Academic Music program, based on the Kodaly method of musical education, students clap, drum and chant to memorize the lengths of musical notes—then solve problems in which fractional notes must add up to a full measure of music.

  根据分数的概念,一节音乐可分成长短不一的几串音符。例如,一节四拍子的调子可包含一个代表四拍子的全音符,两个各代表一个二拍子的二分音符,四个各代表一个一拍子的四分音符……以此类推。在“学术性音乐”项目中,研究人员以科达伊的音乐教育方法为基础,让学生通过打拍子、敲鼓、合唱记住各音符的长度,学生必须把这些片段加起来,才能得到一节完整的音乐——如此实践可解决学生对分数的疑惑。

  Sixty-seven students participated in the study. Half did math problems using the Academic Music system. And after six weeks, the students in the music program averaged 50 percent higher on tests than did the kids in regular math class. Fractions create a solid foundation for further math education—so mastering them is music to educators' ears.

  有67名学生作为实验对象参与了本次研究,其中有一半在“学术性音乐”体系下解决数学问题。六周后,他们在测试中的得分要比普通班级中的学生平均高50%。分数是进一步进行数学知识教学的基础——如此看来,这还多亏了教育者的耳朵。

  英语科普类文章3

  十万年前的颜料工作室

  Archeologists have discovered a paint production studio in an ancient South African cave A new archaeological find may signify one of the great leaps in human cultural and cognitive history. Because researchers have discovered a 100,000-year-old art studio. It was known that ochre—rock with red or yellow pigments—was used for paint even that far back in history. But there was scant evidence for how it was prepared and handled. Then, in 2008, researchers uncovered an ochre mixing kit in a South African cave. They found two abalone shells, most likely used for paint mixing and storage. They also found ochre, bone, charcoal, grindstones and hammerstones. The researchers say the ochre was probably rubbed on quartzite slabs to create a fine powder. It was then mixed and heated with other crushed substances, including other stones or mammal-bone. Microscopic striations on the inner abalone surface likely are likely scrape marks left during paint mixing. The research was published in the journal Science. The paint may have been used for body adornment or for long-gone artwork. And the presence of this paint-production laboratory indicates that the early humans knew basic chemistry and could plan for the future.

  考古学家在南非的一个古老洞穴中发现了一个油漆制作工作室。这个新的考古发现可能是人类文化和认知历史的最伟大的跨越之一。因为研究人员发现的这个工作室产生于十万年前。众所周知,拥有红色或黄色色素的赭石岩一直被广泛运用于绘画中,但却少有证据显示它是如何制作并运用的。2008年,研究人员 在南非的山洞中发现了赭石混合工具, 两个可能用于调漆和储存的鲍鱼壳,除此之外他们还发现了赭石,骨头,炭笔和石锤。研究人员称,这些赭石很有可能经过在石英岩板上仔细研磨后,得到上等的粉末,然后再与 其他石头或者是哺乳动物的粉末混合并加热。用显微镜观察鲍鱼壳的内表面,你可以发现一些刮痕,这些都有可能是在混合颜料的过程中留下来的。这个发现已经被刊登在科学期刊上。这些颜料可能一直被运用在人体彩绘和长久失传的艺术品上。而且这些颜料制作工作室的存在表明了早期人类对化学已有了基本的了解并具有了规划未来的能力。颜料工具的一小步,人类历史的一大步——辛西亚莫。

  英语科普类文章3

  你知道发烧的妙处吗?

  Fever can play a variety of roles, such as inhibiting pathogen replication. It also apparently increases the population of killer T cells of the immune system. Christopher Intagliata reports.

  发烧有多种不同的作用,如抑制病菌复制。它还可以显著增加免疫系统中杀伤性T细胞的数量。

  I've always thought that when I get a fever, it's my body trying to make things uncomfortable for the invading pathogen. And that's often true—higher temperatures can inhibit the bad guys' ability to replicate. But my fever may actually be a one-two-punch. In addition to slowing down the invader, the heat helps the immune system recruit more troops for a counter-attack. That finding appears in the Journal of Leukocyte Biology.

  我很早就知道,发烧的时候,其实是我的身体正在对入侵的病原体做出抵抗。这是事实---高温可以抑制坏病菌复制的能力。但发烧更是一个组合打击。除了减缓病原体的入侵,高温可以帮助免疫系统召集更多的部队做出抵抗。这一研究发表在《白细胞生物学杂志》。

  Researchers warmed up one group of mice to body temperatures of about 103 degrees Fahrenheit. They left another group at normal core temperature—about the same as ours. Then they injected both groups of mice with an antigen, a substance that attracts the attention of the immune system.

  研究人员将一组老鼠的体温升高到103华氏度,另外一组保持正常体温---大约是人体温度。然后向这两组老鼠的体内注射抗原——一种会引起免疫系统反应的物质。

  Blood samples taken three days later revealed that the feverish mice had nearly twice as many killer T-cells: the kind of immune cells that can hunt down infected cells or tumor cells, and slaughter them.

  三天后,这两组老鼠的血样表明,体温较高老鼠组体内的杀伤性T细胞是正常组的2倍,这种免疫细胞可以追踪感染细胞或癌细胞,并将其消灭。

  So when you're sick and you get the chills, the authors say, your body may be trying to tell you to hop under some blankets. Lie down, warm up and send a message. The heat is on.

  所以,当你生病或感到寒冷时,表示你的身体正直向你传达信息--裹条毯子。躺在床上吧,热起来,身体自会做出反应。热度来袭啊。

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