双螺旋线

double spiral的用法和样例：

例句

It provided strong evidence of the structure of D-N-A as a double helix.它为脱氧核糖核酸结构呈双螺旋线提供了有力证据。
Many of the databases along the double helix were shut down, closed, so that you began to function with very little data.许多数据库是顺着双螺旋线停止运行，关闭，让你们开始运行很少的数据。

马克吐温最佳短篇小说 07 Political Economy

Here I was interrupted and informed that a stranger wished to see me down at the door. I went and confronted him, and asked to know his business, struggling all the time to keep a tight rein on my seething political economy ideas, and not let them br

发表于:2018-12-06 / 阅读(480) / 评论(0)

马克吐温最佳短篇小说

英国学生科学读本第88期:冷凝(2)

Thus by heating liquids we cause them to evaporate, or change into vapours or gases; 因此, 可以看出：我们能够通过加热液体使得它们蒸发, 变成水蒸气或气体； and by taking away heat from these gases, or cooling them, we tu

发表于:2018-12-18 / 阅读(294) / 评论(0)

英国学生科学读本

英语口语轻松学第50期:各种刺激的游玩项目

ENGLISH MARATHON Host: Jeffery 1. hot balloon/ what high can we reach? s the height? how 2. paragliding/ spiral / touch down 3. is it safe? / Will you take pics for us? 4. snorkeling/ scuba diving / sky diving

发表于:2018-12-26 / 阅读(269) / 评论(0)

英语口语轻松学

【趣谈英语】一些意大利面的种类-“Spaghetti” Means Little Strings

Pre-Listening Vocabulary pasta: a staple Italian dish, shapes made from flour, water, and sometimes egg retain: to keep translation: the process of changing a word into a different language reed: a tall thin grass that grows in a marshy area spiral:

发表于:2018-12-28 / 阅读(288) / 评论(0)

趣谈英语

数学英语 14 How to Use the Golden Ratio

图片1 图片2 by Jason Marshall Despite many peoples assumption to the contrary, math is undeniably artistic. It takes a tremendous amount of creative muscle and artistry to devise mathematical solutions. And, as made evident by their frequent batt

发表于:2019-01-02 / 阅读(504) / 评论(0)

数学英语

美联社新闻一分钟 2007-02-08

1. NASA says it will review psychological training after astronaut Lisa Nowak's arrest. She's accused of trying to kill another woman in a romantic dispute. She was charged with attempted murder in Florida. On Wednesday, Nowak returned to Texas from

发表于:2019-01-08 / 阅读(348) / 评论(0)

美联社新闻一分钟2007

说一口流利的英语你需要做到这几点！

想要提高流利度，最好的方法之一就是谈论你熟知的话题。当你对自己了解的事物进行讨论时，你会受到更多挑战，因为你会在讨论自己感兴趣的主题时，会使用相关词汇。即使你不懂行话，

发表于:2019-01-08 / 阅读(307) / 评论(0)

英语口语

职场英语：年轻的你该知道的10条工作建议（下）

During your first years in the workforce, you can expect to have a huge learning curve not just about the details of your job, but about broader issues of how to manage your career and operate successfully in an office. How do you deal with difficult

发表于:2019-01-08 / 阅读(293) / 评论(0)

求职英语

与美国小学生一起学英文第11册第11期:星系

Galaxy 星系 Can you believe that there are at least 100 billion galaxies in the universe? Yes, there are. 你相信宇宙中至少有1,000亿个星系吗？确实有。 Small galaxies have 10 billion stars and big galaxies have one trillion stars. 小

发表于:2019-01-10 / 阅读(258) / 评论(0)

与美国小学生一起学英文第11册

与美国小学生一起学英文第10册第11期:螺丝钉

Screws 螺丝钉 Because you see screws every day, every where, you may think they're not important or great. 因为你随时随地都能看到螺丝钉，就可能认为它们不重要或不伟大了。 But screws are very useful, important and grea

发表于:2019-01-10 / 阅读(327) / 评论(0)

与美国小学生一起学英文第10册

节奏布鲁斯:Alina Baraz - I Don't Even Know Why Though

You know what to say on my way out Hit me with the hey been a while Now I'm going straight through the fire fire I don't even know why though Get me on a wave then you fade out Hit me with the light got me hired I should get away from you I know I kn

发表于:2019-01-11 / 阅读(353) / 评论(0)

节奏布鲁斯

AS IT IS 2016-09-13 American Teenager's 'Domino' Artwork Goes Viral

AS IT IS 2016-09-13 American Teenager's 'Domino' Artwork Goes Viral This is Whats Trending Today. A teenager from the northeast state of New Hampshire has one of the top trending YouTube videos this week. Lily Hevesh is known as Hevesh5 on YouTube. S

发表于:2019-01-12 / 阅读(480) / 评论(0)

2016年VOA慢速英语(九)月

英语口语大赢家Topic209:滑冰 Skating

亚当带着丹尼尔和汤姆来滑冰，他去一旁租滑冰用具。带这么两个小孩子来滑冰，应该不是一件简单的事情吧！ Listen Read Learn Clerk: What can I do for you, young man? Adam: I need to rent three pairs of skates for the morning. Clerk: What sizes do you need?

发表于:2019-01-21 / 阅读(241) / 评论(0)

英语口语大赢家

管理压力的方法-将创造力视作工作(5)

Ways To Manage Stress Creatively 管理压力的方法 Accept Creativity as Workbecause who wants a real job anyway? 将创造力视作工作因为，谁想真地工作呢？ The biggest skill is being able to separate yourself from your work. 我认为

发表于:2019-01-22 / 阅读(306) / 评论(0)

英语听力广播—Listening

英语听力：2013-10-27 地平线：黑洞吞噬—17

The difference is that when you have a lot of gas, a lot of stuff orbiting around the black hole, there is a little bit of friction that causes matter to slowly spiral in towards the black hole. As gas continues to spiral in towards the Event Horizon

发表于:2019-01-23 / 阅读(269) / 评论(0)

探索与发现2013年

木偶奇遇记第93期:匹诺曹拒捕(2)

Pinocchio hesitated still another minute. 皮诺乔又犹豫了一分钟。 Then, remembering how his father had often told him that a kind deed is never lost, he swam to Alidoro and, catching hold of his tail, dragged him to the shore. 可他记起他

发表于:2019-01-29 / 阅读(339) / 评论(0)

木偶奇遇记

经济学人350:太阳能花朵的能量

Science and technology 科学技术 Solar energy 太阳能 Flower power 花朵的能量 In matters of clever design, nature has often got there first 若论巧夺天工，自然常常更胜一筹 A virtuous spiral 上面的螺纹看似简单，实际有

发表于:2019-02-06 / 阅读(318) / 评论(0)

经济学人科技系列

美国研究生入学考试难句解读-8

Whilethenew doctrineseemsalmostcertainly correct,theonepapyrusfragment raisesthespecterthatanothermaybe (70)unearthed,showing,forinstance,that itwasaposthumousproductionofthe Danaidtetralogywhichbested

发表于:2019-02-06 / 阅读(221) / 评论(0)

英文语法词汇

听歌学英语:我不是过客 Drive By

听歌学英语:我不是过客 Drive By Train是一个来自美国加利福尼亚州旧金山的摇滚乐队，成立于1994年。Train凭借他们1998年发行的首张专辑Train在主流音乐中取得成功。2001年发行的第二张专辑Drops

发表于:2019-02-18 / 阅读(364) / 评论(0)

听歌学英语

美国文化脱口秀第474期:最该引进中国的美国网红食物

五一小长假，是吃喝放松的好时机！哪些美食新潮流值得尝试？快听Jenny和Tara分享这些即将走红中国的美国网红食物！关键词： Food trend: 美食潮流 Trendy food: 很流行的食物 Foodie: 吃货 #1.Pok: 生

发表于:2019-02-22 / 阅读(289) / 评论(0)

美国文化脱口秀

最新学习文章

热门学习文章

热门标签

英语听力 VOA标准英语 VOA 英语歌曲口语听力提高听力材料听力教程英语学习 NPR 英语口语 VOA慢速英语美国国家电台儿童英语 VOA英语小学英语 cnn VOA常速英语标准英语英文歌曲听电影学英语英语单词英文电影慢速英语 CRI 美联社新闻美国有线新闻加州分级澳洲新闻流行歌曲常速英语 ABC新闻快递疯狂英语英语读物听力棚车少年经济学人英语词汇商务英语 VOA双语新闻 BBC 中国电台大学英语 Treasures 加州语文 BBC英语英语听力网站 VOA英语教学词汇万花筒 SSS VOA英语听力 AP 新概念分级英语英语广播听力精选英语播客英文绘本 TED演讲赖世雄英语MP3 CCTV9英语新闻 lesson 英语新闻初中英语学英语英语语法历史上的今天英文广播剧英语游戏原版英语小说英语有声读物书虫英语牛津英语读物访谈录新闻一分钟考研英语英语每日在线听新闻 Us 新概念英语地道英语单词第二册自然百科高中英语 sports 实用英语 MP3听力辛沛沛 ESL英语第一册英语每日一句 unit 新东方 GRE 每日一词 BBC听力

学英语单词

antiflammability agent

assist in

barrege