英文科普小短文?以下内容选自一本科普读物。I. 既然血液是红色的,为什么静脉是蓝色的呢?事实上,静脉并非蓝色的,而是更接近淡黄色。尽管在人体外的血液看起来是红的,但在皮肤浅表的静脉里,它更接近紫色,但又略显暗红。在皮肤深层,那么,英文科普小短文?一起来了解一下吧。
以下是从一本很流行的科学书中节选的一段。
如果血液是红色的,那么陆袭晌静脉为什么是蓝色的呢?
事实上,静脉不是蓝色的。更早锋清晰的来说他是淡黄色的。尽管从我们身体流出的血液看起来是红色的,但是当血液在离我们皮肤表面很近的时候,它呈现的是紫红色的。当静脉里淌满红色的血液后,它会因为周围皮肤颜色的影响和对比而看起来更像蓝色。
你的大脑和心脏哪个工作更卖力些?
这基本上是看你更忙着思考还是忙着运动。在运动锻炼过程中,你心脏的工作程度要比平时高出三倍,它似乎禅谨是要生产出够一辈子用的血液去维持身体这个超大油轮。但是从长远上看,你的大脑或许更胜一筹,因为即使是你什么也不干坐在那里,大脑都要消耗掉比心脏多两倍的能量,并且需要四到五倍的血液去维持大脑的运转。
以下内容选自一本科普读物。
I. 既然血液是红色的,为什么静脉是蓝色的呢?
事实上,静做升脉并非蓝色的,而是更接近淡黄色。尽管在人体外的血液看起来是红的,但在皮肤浅表的静脉里,它更接近紫色,但又略显暗红。在皮肤深层,这些充血的静脉反射出的红色光线稍逊于周边的皮肤,反衬之下就呈蓝色了。
II. 哪个工作更忙,粗前心脏还岩胡清是大脑?
这要看你是忙于思考还是忙于运动。在运动时,心脏的工作强度足足是大脑的三倍,在人的一生中传输的血液足以装满一个超级油箱。但是,从长期来看,大脑很可能更忙,因为即使人坐着不动,大脑消耗的能量仍然是心脏消耗的两倍,因此它也需要四到五倍的血液来供应。
人工翻译,如有不妥请指正
(标题1)如果血液是红色的,为什么静脉血是蓝色的吗?
实际上,在所有的静脉不是蓝色的。他们越来越清晰,色泽微黄。尽管血是红色时它的身体外面,当它在皮肤表面的血管,它更是一个暗紫色。在正确的深度,这些充满血液的静脉反射较少的红颂滑淡比周围的皮肤,使它们看起来蓝色的比较。
(标题2)是你的心脏或大脑工作更努力?
这类取决于你是否忙或忙着锻炼思维。你贺耐的心是三倍的努力在运动过程中,并将足够的血液来填补油轮过一辈子。但是,从长远来看,你的大脑可能提示它,因为即使你坐你的大野拍腊脑是使用两倍,你的心太多的能量,它需要四到五倍的血液喂它。
GLOBAL WARMING(温室效应)
Everywhere you look right now you will hear about the pheonomia of “global warming.” To understand global warming you need to understand the difference between climate and weather. Climate, as defined by Webster’s Dictionary is “丛粗the average course or condition of the weather at a place over a period of years as exhibited by tepemperature, wind velocity, and precipition” while weather is the “state of the atmosphere with respectto heat or cold, wetness or dryness, calm or storm, clearness or cloudiness”渗棚镇 (Webster). Therefore climate describes the weather over time. Climate change and global warming are frequently used interchangeable but like climate and weather they do have different definitions. “Climate change refers to any significant change in measures of climate for an extended period” and global warming is an increase in the temperature of the atmosphere near the Earth's surface and in the troposphere, which can contribute to changes in global climate.
Global warming is caused by several causes such as pollution from factories, carbon dioxide from rotting trees, the burning of coal, natural gasses and fossil fuels lead to methane travelling into the Earth'和孝s atmosphere any transportation vehicles, water vapour, and many other little things, which contribute to make global warming even worse.
Scientists have different opinions about whether the current global warming is natural or unusual. Some believe that it is part of the Eath's natural cycle of warming and cooling. However most believe that what we are now experiencing is unusual and has been caused by human activities.
First, English is aworld language. It is said that you can communicate everywhere if you know English. Second, China is opposed to the opportunity to develop is economy worldwide.It is essential to know other countries' economic and cultural background. English is the key to the success. Third, more and more foreigners are interested in Chinese literature and culture. Mastering the English, we can better promote our heritage and let more people understand and like China.摘自《 苏教高弊山版小学六年级金卜禅卷》戚中
以上就是英文科普小短文的全部内容,2、the popular science knowledge and science technology 科普知识与科学技术 历史上有很多发明,起着很重要的作用,其中一些改变了世界。依你之见,什么是最重要的发明,并说明原因,也就是它起的作用(不少于三点)。80词左右。