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TEDEd_HowMuchPower_2020E-_全球供电需要多少电力呢？_-
You flip a switch. 你拨动开关,
Coal burns in a furnace , which turns water into steam. 炉中燃烧的煤将水变成蒸汽,
That steam spins a turbine , which activates a generator , which pushes electrons through the wire. 蒸汽推动涡轮并带动发动机, 推动电子通过导线形成电流。
This current propagates through hundreds of miles of electric cables and arrives at your home. 电流通过数百英里电缆的传送, 并到达你家。
flip:n.浏览;空翻;轻抛;捻掷;v.迅速翻动;按(开关);按(按钮);开(或关)(机器等); furnace:n.熔炉;v.在炉中烧热(金属); spins:n.[物]旋转; v.[物]旋转(spin的三单形式); turbine:n.汽轮机;涡轮机; activates:v.[电子][物]激活;活化(activate的三单形式); generator:n.发电机;发生器;电力公司; electrons:n.[物]电子(electron的复数形式); propagates:vt.传播;传送;繁殖;宣传;vi.繁殖;增殖; electric:n.供电;adj.电的;用电的;电动的;发电的; cables:n.缆绳;钢索;电缆;电报;v.发电报;(cable的第三人称单数和复数)
All around the world, countless people are doing this every second— flipping a switch, plugging in, pressing an “on” button. 全球每一秒都有无数人在做这件事—— 拨动开关,插电并按下“开”按钮,
So how much electricity does humanity need? 那么人类需要多少电力呢？
The amount we collectively use is changing fast, so to answer this question, we need to know not just how much the world uses today, but how much we’ll use in the future. 我们共同使用的电量正快速变化, 所以要回答这个问题, 我们不仅需要知道 目前全球用电多少, 还要知道将来会使用多少。
countless:adj.无数的;数不尽的; flipping:v.该死; v.(使)快速翻转; (flip的现在分词) plugging:v.堵塞;封堵;补足;补充;推广;宣传;(plug的现在分词) electricity:n.电力;电流;强烈的紧张情绪; humanity:n.人类;人道;仁慈;人文学科; collectively:adv.共同地,全体地;
The first step is understanding how we measure electricity. 第一步是了解我们如何测量电力,
It’s a little bit tricky . 这有点棘手。
A joule is a unit of energy, but we usually don't measure electricity in just joules . 焦耳是能量单位, 但通常不只用焦耳来衡量电,
Instead, we measure it in watts . 而是用瓦特来衡量它。
Watts tell us how much energy, per second, it takes to power something. 瓦特是某物每秒所需电量,
tricky:adj.难办的;难对付的;狡猾的;诡计多端的; joules:n.焦耳(joule的复数); watts:n.瓦特(功率单位);
One joule per second equals one watt. 1 焦耳/秒 = 1 瓦特。
It takes about .1 watts to power a smart phone, a thousand to power your house, a million for a small town, and a billion for a mid-size city. 智能手机供电大约需要 0.1 瓦, 你的房子供电需 1 千瓦, 小镇供电需要 100 万瓦, 一个中等城市需要 10 亿瓦。
As of 2020, it takes 3 trillion watts to power the entire world. 到 2020 年,全球 需要 3 万亿瓦供电,
But almost a billion people don’t have access to reliable electricity. 但近 10 亿人无法 获得可靠的电力。
As countries become more industrialized and more people join the grid , electricity demand is expected to increase about 80% by 2050. 随着国家越来越工业化, 越来越多的人加入电网, 预计到 2050 年 电力需求将增加约 80%。
trillion:n.[数]万亿;adj.万亿的;num.[数]万亿; reliable:adj.可信赖的;可依靠的;真实可信的;可靠的; industrialized:adj.工业化的;v.使工业化;将…组成产业(industrialize的过去分词); grid:n.网格;格子,栅格;输电网;
That number isn't the complete picture. 这个数据并不完整,
We'll also have to use electricity in completely new ways. 我们还必须以全新方式使用电力。
Right now, we power a lot of things by burning fossil fuels, emitting an unsustainable amount of greenhouse gases that contribute to global warming . 现在,我们通过燃烧化石燃料 为很多东西提供动力, 排放不可持续的温室气体, 导致全球变暖。
We’ll have to eliminate these emissions entirely to ensure a sustainable future for humanity. 我们必须完全消除这些排放, 以确保人类的可持续未来。
The first step to doing so, for many industries, is to switch from fossil fuels to electric power. 对于许多行业来说, 实现目标的第一步 是由化石燃料转向电力。
fossil:n.化石;老人;老古董;adj.从地下发掘出来的;化石的;属于旧时代的;陈腐的; emitting:v.发出,射出,散发(光、热、声音、气等);(emit的现在分词) unsustainable:adj.无法支撑的;不可证实的;不能成立的; greenhouse:n.温室;暖房; contribute to:有助于;捐献; global warming:n.全球(气候)变暖;地球大气层变暖; eliminate:v.消除;排除; emissions:n.(光、热、气等的)发出,排放;排放物;散发物;(emission的复数) ensure:vt.保证,确保;使安全;
We'll need to electrify cars, switch buildings heated by natural gas furnaces to electric heat pumps , and electrify the huge amount of heat used in industrial processes . 我们需要汽车电气化、 将天然气炉供热的建筑 转换为使用电热泵, 并用电来满足工业过程中 使用的大量热量。
So all told, global electricity needs could triple by 2050. 总而言之,到 2050 年, 全球电力需求可能增加 2 倍。
We’ll also need all that electricity to come from clean energy sources if it’s going to solve the problems caused by fossil fuels. 若要解决化石燃料引起的问题, 所有电力都必须来自清洁能源。
electrify:v.使电气化;使通电;使兴奋; natural gas:n.天然气; furnaces:n.炉子,[炉窑]熔炉(furnace复数形式); pumps:n.[机]泵; v.用泵送; processes:n.过程; v.处理(process的第三人称单数形式); triple:adj.三部分的; n.三倍的数[量]; v.成为三倍; sources:n.来源;出处;起源;根源;原因;v.(从…)获得(source的第三人称单数和复数)
Today, only one third of the electricity we generate comes from clean sources. 今天,我们的电力中 只有 1/3 来自清洁能源。
Fossil fuels are cheap and convenient , easy to ship, and easy to turn into electricity on demand . 化石燃料便宜又方便,易于运输, 并且很容易按需转化为电能。
So how can we close the gap ? 那么如何弥补差距呢？
Wind and solar power work great for places with lots of wind and sunshine , but we can’t store and ship sunlight or wind the way we can transport oil. 风能和太阳能非常适合 风和阳光充足的地方, 但无法像运输石油那样 储存和运输阳光或风力。
generate:v.产生;引起; convenient:adj.实用的;便利的;方便的; on demand:请求即;按需;随选;随需应变; gap:n.差距;间隙;缺口;间隔;v.使豁裂;豁开; sunshine:n.阳光;日光;欢乐;幸福 sunlight:n.日光; transport:n.运输;输送;运送;运输机;v.输送;传播;使产生身临其境的感觉;(旧时)流放;
To make full use of energy from these sources at other times or in other places, we’d have to store it in batteries and improve our power grid infrastructure to transport it long distances. 为了在其他时间或其他地方 充分利用这些来源的能源, 我们必须把它储存在电池里, 并改善我们的电网基础设施, 以实现长距离传输。
Meanwhile , nuclear power plants use nuclear fission to generate carbon-free electricity. 同时,核电站利用核裂变 产生无碳电力。
Though still more expensive than plants that burn fossil fuels, they can be built anywhere and don’t depend on intermittent energy sources like the sun or wind. 虽然仍比燃烧化石燃料的电厂昂贵, 但它们可以建在任何地方, 并且不需依赖像太阳 或风这样的间歇性能源。
make full use of:充分利用; batteries:n.电池;炮组;炮列;[法]殴打;(batteries是battery的复数) improve:v.改进;改善; infrastructure:n.基础设施;公共建设;下部构造; Meanwhile:adv.同时,其间;n.其间,其时; nuclear power:na.核大国; nuclear fission:n.核裂变; carbon-free:adj.不含碳的; intermittent:adj.间歇的;断断续续的;间歇性;
Researchers are currently working to improve nuclear waste disposal and the safety of nuclear plants. 研究人员正努力改善核废料处理 以及核电站的安全。
There’s another possibility we’ve been trying to crack since the 1940s: nuclear fusion . 自 20 世纪 40 年代起, 我们一直试图破解另一种可能性: 核聚变。
It involves smashing light atoms together, so they fuse , and harnessing the energy this releases . 原理是让轻原子相撞后融合在一起, 然后利用融合释放的能量。
currently:adv.当前;一般地; nuclear waste:n.核废料; disposal:n.处理;清除;去掉;(企业、财产等的)变卖; crack:v.使破裂;打开;变声;n.裂缝;声变;噼啪声;adj.最好的;高明的; nuclear fusion:na.核聚变;核融合;"atomicfusion"的变体; involves:v.包含;需要;牵涉;牵连;影响;(使)参加,加入(involve的第三人称单数) smashing:adj.了不起的,极好的;粉碎性的,猛烈的;v.粉碎(smash的现在分词); atoms:n.[物]原子(atom的复数); fuse:n.保险丝;导火线;v.(使)融合,熔断;熔接; harnessing:v.给(马等)装上挽具(harness的现在分词);治理,利用; releases:n.释放; vt.释放;
Accidents aren't a concern with nuclear fusion, and it doesn't produce the long-lived radioactive waste fission does. 核聚变无事故之忧, 也不会像核裂变那样 产生长寿命放射性废物;
It also doesn’t have the transport concerns associated with wind, solar, and other renewable energy sources. 它也没有运输难题, 不像风能、太阳能 及其他可再生能源那样。
A major breakthrough here could revolutionize clean energy. 这方面的重大突破 可能会彻底改变清洁能源,
concern:v.涉及,关系到;使担心;n.关系;关心;关心的事; long-lived:adj.长命的;历时长久的; radioactive:adj.[核]放射性的;有辐射的; concerns:n.关注; v.使关心(concern的三单形式); associated:adj.有关联的; v.联想; (associate的过去分词和过去式) renewable:adj.可再生的;可更新的;可继续的;n.再生性能源; breakthrough:n.突破;开始取得成功之时;adj.突破性的; revolutionize:vt.发动革命;彻底改革;宣传革命;vi.革命化;从事革命;
The same is true of nuclear fission, solar, and wind. 核裂变、太阳能和风能也是如此。
Breakthroughs in any of these technologies , and especially in all of them together, can change the world: not only helping us triple our electricity supply, but enabling us to sustain it. 任何这些技术的突破, 尤其是所有这些方面的突破, 就能改变世界: 不仅帮我们实现 3 倍电力供应, 而且使我们能维持下去。
Breakthroughs:突破; technologies:n.技术;科技(technology的复数); especially:adv.尤其;特别;格外;十分; enabling:adj.授权的;v.使能够;授权给(enable的现在分词);