英语翻译课件

我是把整个视频所讲述的英语翻译下来，由于技术水平不是很高，所以不会做字幕。①人类的心脏是如何工作的： 人的心脏——像一个拳头一般大小，是人体最重要的器官之一。心脏一天之内能跳动超过十万次并把超过两千加仑的血液通过六十七英里长的管网输送到全身各个部位。 心脏由四个腔体构成——左心房、左心室、右心房、右心室。 心脏的左侧将身体用过的，含氧量低的血液通过肺动脉输送到肺部。在那，血液会被重新注入氧气。 心脏的右侧接受来自肺部充满氧气的血液。它将这些血液输送至主动脉，在通过各种血管系统输送到全身。 这一过程中，身体内产生的废物与二氧化碳会排出体外，全身也会得到新的氧气与养料。 当右心房将血液再输送到左心室，一个血液的循环便完成了。②：心脏的瓣膜是如何工作的。 心脏有四个瓣膜。瓣膜是一种单向阀门，它阻止血液倒流从而使血液像一个方向流淌。 瓣膜由2-3块强而有韧性的组织--瓣叶构成。瓣膜张开让血液流过，闭合使血液停止倒流。 瓣膜的张合是由在四个腔体中的血压转换器控制的。 左侧的三尖瓣位于右心室与右心房之间。 左侧的肺动脉瓣位于肺动脉与右心室之间。 右侧的二尖瓣位于左心房与左心室之间。 而右侧的主动脉瓣位于左心室与主动脉之间。③什么是冠状动脉疾病 当心脏进行血液循环时，少量的血液回经由一些细小的血管直接向心脏供血。这些细小的，围绕着心脏的血管就叫做冠状动脉。 在冠状动脉中存在着一种独立的循环叫做冠状动脉循环。这一循环使心脏持续保持在充满氧气与养料的状态下。 冠状动脉主要分为两支：左侧主冠状动脉与右侧主冠状动脉。 冠状动脉疾病的发生时由于冠状动脉中发生了胆固醇堆积所造成的粥样硬化。这种硬化会堵塞冠状动脉并造成心脏损伤或心脏骤停。④心脏中的电子系统是怎么样的心脏之所以会有节律的跳动是因为心肌所产生的电子脉冲所造成的。这些电子脉冲信号由窦房结——有时也叫做心脏的天然起搏器发出。这些信号随后会被传输到房室结。在这，信号会被检验并传送到血管中引起血管收缩。你心律之所以会变化是于多种外部因素有关的，像饮食，运动，压力等等。

你教美术的么？我也需要 把你翻译的好一点Tengzigou the best male artist of two joint creative use of the pen name. They are vine hung and amphetamine--grandchildren. Vine Honsen in December 1, 1933, Toyama County high Gang City. Security--grandchildren born March 10, 1934, Toyama City in the county water, in terms of age, we can see that and Japan "comic god" with the character of a generation. This age was just two of the three artists, the fifth-grade students at the time, the bus schedules standing graves primary school, is the second class students. In 1946, after graduating from primary school, was admitted vine hung Electrical Technology College Division, On-grandchildren moved to a higher-secondary Gang. Because of the common love of comics, two people have maintained a close relationship. In 1947, the Japanese cartoon history of epoch-making significance for a new 』the New Taiwan issued. Its author is amazing. This works of vine-and amphetamine-grandson has had a major impact, they determined the cause of his career in comics. Initially, they draw together film comics, and the vine-made magic light reflection on the screening machine, to the adjacent children, been welcomed by everyone. They also juvenile comics such as magazines and journals, a common Central Issue 』and mini solar magazine. They jointly created by comic 『Angels yu』 been cleared 』students Daily News used a series of 10 chapters.

Equipment maintenance directory, pump gas purification (a), definition and classification of the pump (two), treatment plants use pump structure, working principle, maintenance and the common faults of centrifugal pump reciprocating pump metering pump, 5 screw pump, gear pump(three), pump daily maintenance and repair program (a), the definition and classification of the pump, the pump is the original motive of the mechanical energy is converted to liquid energy machine. The original motivation (motor, diesel engine etc.) drives the impeller to rotate through shaft, to do work on liquid, so the energy (including potential energy, pressure energy and kinetic energy) increases, so that the liquid delivery requirements to high pressure or place. • pump is a kind of general machinery important, products are widely used in industry, agriculture. Industry is mainly applied to the field of thermal power, nuclear power, petroleum, petrochemical, city water supply, environmental protection etc.. In many species, pump, classification method, it also each are not identical, according to its working principle can be divided into three categories: vane type pump, positive displacement pumps, other types of pumps. We now according to the structure, medium, use comprehensive classification, see table(two), treatment plants use pump structure, working principle, maintenance and common fault • 1, centrifugal pump centrifugal pump is the basic structure composed of six parts are the impeller, pump body, pump shaft, bearings, seal rings, stuffing box. Impeller centrifugal pump is the core part, its higher speed, the impeller blades and played a major role in the assembly before, the impeller through the static equilibrium experiments. Internal and external surface of impeller on the requirements of smooth, to reduce the flow friction loss. Also known as pump pump shell, which is the main water pump. Play a role in supporting fixed, and is connected with the installation of the bearing bracket. The role of pump shaft coupling and motor by connecting, the motor torque to the impeller, it is the transmission of mechanical energy of the main components. Is a set of bearings component on the support shaft in the shaft, a rolling bearing and sliding bearing two. Rolling the use of butter as a lubricant oil to be appropriate is 2/3 3/4 size too much may have a fever, and too little heat and noise! Sliding bearings using a transparent oil as lubricant, fuel to the oil level line. Too much oil to be leaking along the shaft and drift of base, too little overheated bearings burned to the accident! Bearing in the pump during operation the maximum temperature of 85 degrees in the general run of about 60 degrees, if we should find the reasons for higher (whether there are impurities, oil is black, is water) and timely treatment.Also known as reduced leakage sealing ring ring. Impeller and pump shell gap between the pump pressure will cause the water flow through the gap area of low pressure water pump, effect, efficiency! The gap is too small will cause the impeller and the pump shell friction and wear. In order to increase the return to reduce the internal leakage resistance, the service life of delaying the impeller and the pump shell, junction with sealing ring in the pump impeller shell edge and foreign aid, sealing the gap remained at between 0.25 ~ 1.10mm is appropriate. Stuffing mainly by the packing, seal ring, tube filler, filler cap, seal tubes. Fill the role of letter is to close the gap between the pump shell and a pump shaft, not to pump the water flow out to not let the outside air into the pump. Always maintain the vacuum pump! When the pump shaft and the packing heat friction depends on the water pipe on the living water to fill the cooling water sealed circle! To maintain the normal operation of pumps. So in the operation process of pump in the inspection tour of inspection of the stuffing is the special attention should be paid to! On the packing should be replaced in about 600 hours to runCentrifugal pump working principle: when the centrifugal pump, pump shaft to drive the impeller to rotate quickly, forcing the pre filling rotating liquid in leaves, in the inertial centrifugal force, the liquid from the impeller center outward radial motion. Liquid obtained energy during the motion process flows through the impeller, pressure can increase, the increase of flow rate. When the liquid from the impeller to enter the pump shell, and deceleration due to shell channel expands gradually, part of kinetic energy into pressure energy, the final discharge pipe along a tangential flow. So the volute is not only from the impeller outflow liquid components, but also a turning device. When the liquid from the impeller center swing outward to form a low pressure area, the center of the impeller, the total potential energy surface and the center of the impeller tank under the difference, thus the liquid is sucked into the center of the impeller. Relying on the continuous running impeller, the liquid will be continuously suction and discharge. The mechanical energy of liquid in the centrifugal pump performance for the ultimate pressure can improve.It should be stressed that, if the pump before the start should be filled with liquid to be delivered to the pump shell, because the air density is low, the centrifugal force produced by the rotation of the impeller, the impeller center area is not enough to form a suction pressure liquid storage tank, so although the centrifugal pump can not transport liquid. This shows that the non self priming centrifugal pump, this phenomenon is called gas. Suction piping installation check valve is to prevent before the start into the pump shell liquid flows out from the shell. Air from the suction pipe to cause gas tied all the pump casing. 望采纳！！！