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分集介绍：积分的概念来源于实际的应用。对一个函数积分可以理解为求曲线下的面积，但积分的作用不仅仅如此。有了积分，我们就可以去计算曲线的弧长，可以去求区域的面积， 也可以去
麻省理工学院公开课：单变量微积分
I: Boris, look at this sentence.Healthy eating is not about strict nutrition philosophies, staying unrealistically thin, or depriving yourself of foods you love. It's interesting, isn't it? B: I'd rather say it's confusing. what are those strict nutr
和老外聊天地道口语
Despite all this, Dr Dave doesn't think much of this contribution to computing history. 尽管有这一切的原由，Dave博士并不觉得他这项在计算机发展史上极有贡献的发明有多了不起。 学习重点： 1.think much of 推崇
留美老师带你每日说英文
Unit 2 助动词、情态动词(二) 4. With all this work on hand, he _____ to the cineman last night. A. mustn't go B. wouldn't go C. oughtn't to go D. shouldn't have gone 5. You _____ all those cal
英文语法词汇
They are important to us because they are important to our customers, who depend on them for the most demanding, business-critical computing. 这些产品对我们非常重要，因为它们对我们的客户很重要，我们的客户正依赖它们完
财富精英励志演讲
In this environment, Compaq determined that we needed to do more for our customers. 在这种市场环境里，康柏决心要为我们的客户做更多的事情。 We wanted to take the attributes that had made us successful - industry standard pla
财富精英励志演讲
Thank you, and good morning. everyone. 谢谢大家，早上好! It is always an honor and a pleasure to speak here at PC Expo. 能够在PCExpo展览期间在这里演讲，我感到十分荣幸，而且非常高兴。 An honor because this is the pr
财富精英励志演讲
Why don't we care more about gross national happiness? Now, in essence, the king was asking us to consider an alternative definition of success, what has come to be known as GNH, or gross national happiness. Most world leaders didn't take notice, and
财富精英励志演讲
So we started asking ourselves: What kind of less obvious metrics could we use to actually evaluate our employees' sense of meaning, or our customers' sense of emotional connection with us? For example, we actually started asking our employees, do th
财富精英励志演讲
I took one psychology class in college, and I learned about this guy, Abraham Maslow, as many of us are familiar with his hierarchy of needs. But as I sat there for four hours, the full afternoon, reading Maslow, I recognized something that is true o
财富精英励志演讲
What counts for Vivian was the emotional connection she created with her fellow employees and our guests. And what gave her inspiration and meaning was the fact that she was taking care of people who were far away from home. Because Vivian knew what
财富精英励志演讲
This is Dave Arringdale who's actually been a longtime guest at Vivian's motel. He stayed there a hundred times in the last 20 years, and he's loyal to the property because of the relationship that Vivian and her fellow employees have created with hi
财富精英励志演讲
I've taken that Robert Kennedy quote, and I've turned it into a new balance sheet for just a moment here. This is a collection of things that Robert Kennedy said in that quote. GDP counts everything from air pollution to the destruction of our redwoo
财富精英励志演讲
at 19XX price 按一九ＸＸ年价格计算 at a discount 按赔价计算；按贴水价格计算；打折扣 at a premium 按溢价计算；按升水价格计算 at call 通知付款；按通知 at
财会英语
Full coverage: 6.5-Magnitude Quake Hits Southwest China's Yunnan Surveillance video footage shows the moment the quake hit. This is at a pedestrian street at a square in Ludian County. In another region, people ran to the street after the quake hit.
CCTV9英语新闻2014年08月
有位男士妙用表示大学学位的三个英文词讲了一则幽默：人生会经历的三个阶段：没结婚的时候是无忧无虑的bachelor(单身汉)；结婚以后得做主持家事的一家之主(master)；而一旦孩子出生，就变
英语口语
1. I cant take you any more! 我再也受不了你啦！ 2. I hate you! 我讨厌你！ 3. Im telling you for the last time! 我最后再告诉你一次！ 4. What do you want? 你想怎么样？ 5. Dont look at me like that. 别那样看着我。 6.
英语口语
如果把一个方形的盒子放在一个圆形的容器里，两者肯定是不能完全契合了。这就是我们所说的格格不入。今天，我们就来总结一下英语里这个词的地道表达。 1. His appearance here is like a square
英语口语
一到过节或假期，朋友们都会聚在一起吃喝玩乐一下。负责主办聚会的房子可就遭殃了，聚会结束以后肯定是一片狼藉，要花好多时间整理和清洁才行。今天，我们就来说说英语里对于乱七八
英语口语
Dogs do have much shorter life spans than we humans do. In an attempt to gauge our pets stage in life in a way we can relate to, we often use the popular myth of multiplying their age by seven. One problem with the formula is that it doesnt consider
英语时差8，16