蚌埠123医院激光脱毛多少钱健频道
时间:2017年10月18日 12:07:21

TED演讲者们对这个世界各抒己见。 Article/201506/382098

Time travel was once considered scientific heresy.时间旅行曾一度被当作科学邪说I used to avoid talking about it由于害怕被贴上科学怪人的标签for fear of being labeled a crank.我过去常常避免谈及此事But these days, I#39;m not so cautious.现如今,我不会再顾虑这些In fact, I#39;m more like the people who built stonehenge.实际上,我更像是建造巨石阵的那些人I#39;m obsessed by time.我对时间着迷了If had a time machine若我有台时间机器I#39;d visit Marilyn Monroe in her prime我想去拜访鼎盛时期的玛丽莲·梦露or drop in on Galileo as或者去拜访正用望远镜he turned his telescope to the heavens.眺望星空的伽利略Perhaps I#39;d even travel to the end of the universe我甚至想穿越到宇宙的尽头to find out how our whole cosmic story ends.去探寻宇宙的完整故事结局To see how this might be possible,要验这些想法能否实现we need to look at time as physicists do我们需要像物理学家那样as the fourth dimension.以四维的角度看时间It#39;s not as hard as it sounds.四维时空并不像听起来那样令人费解All physical objects, even me and my chair,所有的物体,甚至是我和我的椅子exist in three dimensions.都是三维的Everything has a width and a height and a length.任何事物都有宽度,高度和长度But there is another kind of length -- a length in time.但是还存在另一种维度,即时间维度While a human may survive for 80 years,与人类的80余年寿命相比these stones will last much longer这些石头延续得更久远-- for thousands of years.甚至长达数千年And the solar system will last for billions of years.而太阳系则能达到数十亿年Everything has a length in time,所有事物在时间上都有长度as well as space.在空间内同样如此Traveling in time means时间旅行意味着traveling through this fourth dimension.穿越第四维时空To see what that means, let#39;s do a bit of normal为更好地理解,我们以日常旅行为例everyday traveling just to get a feel for it.来直观体会一下四维时空的含义A fast car makes it a bit more fun.一辆高速行驶的车能让实验变得更生动Drive in a straight line, and you#39;re traveling in one dimension.在一条直线上行驶,是在一维空间内Turn right or left, and you add the second dimension.左转或右转,就增加了第二维空间Drive up or down a twisty mountain road,在蜿蜒的山路上下颠簸and that adds height.就增加了高度的维度So that#39;s traveling in all three dimensions.这样就算是在三维空间内行驶了But how on earth do we travel in time?但我们究竟要怎样才能实现时间旅行呢How do we find a path怎样才能找到一条through the fourth dimension?通往第四维空间的路呢Let#39;s indulge in a little science fiction for a moment.让我们用一个小小的科幻情节放松一下 Article/201507/383651

栏目简介:《跟jade老师学英语》是英语视频听力下面的子栏目,来之英伦的美女老师jade,一口纯正的伦敦腔,听上去就是一种享受,最重要的是妈妈再也不用担心我看不懂权利的游戏了。通过视频讲解,英语学习爱好者能够更好地理解英语知识内容,培养英语学习的兴趣,是提高英语水平的好伙伴。 Article/201510/400295

We have always been fascinated by coffee#39;s potential.我们总是被咖啡的可能性所深深吸引着。Single-origin coffees have a distinct regional taste and flavor profile in the cup.单品咖啡在杯中有一种独特的区域口感以及风味特性。Curiosity pushes us to explore combining these unique flavors--this is a blend.好奇心驱使我们探索将这些独特风味混和在一起--这是综合咖啡。Just as a chef combines ingredients into a dish that#39;s one of a kind,正如大厨将食材搭配成一道独一无二的料理,our coffee masters craft with coffees from around the globe.我们的咖啡大师运用来自全球的咖啡品种。These distinctive blends celebrate coffee#39;s potential and our heritage.这些与众不同的综合咖啡颂扬咖啡的可能性以及我们的传承。And each blend opens a new story, taste, and world unto itself.每一种综合咖啡都开启独特的全新故事、口感,以及世界。 Article/201702/491025


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