相加的效用函数;可加效用函数

历年考研英语翻译mp3(1996)

[00:00.51]1996 [00:02.83]The differences in relative growth of various areas [00:06.04]of scientific research have several causes. [00:09.57](1)Some of these causes [00:10.88]are completely reasonable results of social needs. [00:14.41]Others are re

发表于:2018-11-30 / 阅读(127) / 评论(0)

历年考研英语翻译

大学英语四级词汇 082

useless 无用的，没有价值的 user 用户，使用者 usual 通常的，平常的 usually 通常 utility 效用，实用 utilise 实用 utilize 利用 utmost 极度的，极端的，极限 utter 完全的，彻底的说 vacant 空闲的，空缺的

发表于:2018-12-01 / 阅读(112) / 评论(0)

大学英语四级词汇拼读版

闭着眼睛飘单词四级词汇64

[0:0]urban城市的 [0:32.7921]urge urgent utility utilize鼓励，激励紧急的，急迫的功用，效用利用 [1:11.2978]utmost vacant vacuum vague极度的，最大的未被占用的，空着的真空含糊的，模糊的 [1:52.9962]vain valid vanish variable徒劳的，无效的有效的，

发表于:2018-12-05 / 阅读(132) / 评论(0)

闭着眼睛飘单词四级词汇

VOA慢速英语20060704a

AGRICULTURE REPORT - Jojoba: Not Your Usual Oilseed CropBy Mario Ritter Broadcast: Mon, 3 Jul 2006 16:00:00 UTC I'm Shep O'Neal with the VOA Special English Agriculture Report. Jojoba plants We have a

发表于:2018-12-07 / 阅读(91) / 评论(0)

2006年慢速英语（七）月

科学美国人60秒 SSS Pesticide Additive Could Be One Culprit in Bee Deaths

Pesticide Additive Could Be One Culprit in Bee Deaths 农药添加剂是蜜蜂死亡的一大诱因 Springtime is flower season. And that includes some 90 million almond trees in California. It's the largest pollination event in the U.S.and beekeeper

发表于:2018-12-24 / 阅读(74) / 评论(0)

2017年Scientific American(二)月

趣味青春英语电台第162期:On the same page

Idiom: On the same page 对于某事有着共同的角度，达成共识 Hit the book: Agreed-upon Side job Spell out Deadline Provision Utility Premium Financial crunch

发表于:2018-12-27 / 阅读(137) / 评论(0)

趣味青春英语

【听听测测】Model Test 75

One of the most____ kinds of cars in the United States is not____ a car at all. It is a____ of a car and a___. It is called a sports utility____ or SUV. Some people____ these vehicles. They say SUV use too much___ and increase air____. They also say

发表于:2018-12-30 / 阅读(104) / 评论(0)

听听测测

听广告学英语-Multi-function System理光数码多功能系统

听广告学英语:RICHON Aficio Digital Multi-function System理光数码多功能系统原文：Mary:Everybody calls me a multi-function secretary. One of her bosses (gives her a pad of paper):Mary, pick up this. Mary:Because I have to serve several bosses. Anothe

发表于:2019-01-02 / 阅读(206) / 评论(0)

听广告学英语

ENVIRONMENT REPORT - Sport Utility Vehicles

ENVIRONMENT REPORT - October 4, 2002: Sport Utility Vehicles By Mario Ritter This is the VOA Special English ENVIRONMENT REPORT. One of the most popular kinds of car in the United States is not really

发表于:2019-01-02 / 阅读(86) / 评论(0)

健康与环境

第6集：水电

英語筆記本的誕生，是由於我剛到美國時，每天都可以學到很多新鮮又有趣的單字或是對話，我將這些對話歸納整理成今日的規模。這些大多數都是在書

发表于:2019-01-03 / 阅读(65) / 评论(0)

小笨霖英语笔记

TED演讲:一项关于电动车的大胆计划(8)

And that's the difference between problems that are additive, like CO2, 这个就是可添加性问题，像二氧化碳问题， which we go slowly up and then we tip, and problems that are depletive, in which we lose what we have, which oscillate, 慢

发表于:2019-01-03 / 阅读(82) / 评论(0)

TED演讲科技篇

TED演讲:下一次工业革命就在眼前(5)

Last year in the US, they helped Amazon prepare and ship all the products required for Cyber Monday, 去年在美国，机器人帮助亚马逊发货，以应对网络星期一带来的 the annual peak of online retail. 年度线上零售消费高峰。

发表于:2019-01-18 / 阅读(78) / 评论(0)

TED演讲国际问题篇

经济学人: 回收:塑料公路 (3)

Cleaning and sorting plastic made out of multiple polymers can be relatively expensive, 清理和将多种聚合物制成的塑料进行分类的成本相对昂贵， especially if it is used to make low value products such as packaging. 尤其是这些

发表于:2019-01-26 / 阅读(106) / 评论(0)

经济学人科技系列

经济学人86:3D印刷印刷未来

Science and Technology Three-dimensional printing An image of the future 科技 3D印刷印刷未来 One of the biggest manufacturers in the world gives 3D printing a go 世界龙头机器制造商用3D印刷术进行了一次格外成功的应用 U

发表于:2019-01-26 / 阅读(99) / 评论(0)

经济学人科技系列

车展英语怎么说

Ford plans to introduce its Edge sports utility vehicle (SUV) at the upcoming Beijing Auto Show this month in a bid to tap fast-growing demand for SUVs among Chinese customers. 福特公司计划在本月的北京车展上展出Edge 越野车(SUV)，以

发表于:2019-02-05 / 阅读(90) / 评论(0)

实用英语

7 Can’t-Miss Ways to Defeat the Procrastination Habit

7 Cant-Miss Ways to Defeat the Procrastination Habit Note: This is a guest post by Arjun Muralidharan from The Productive Student. I have the classic problem of thinking about being productive, but not putting it into action. Thats whats troubling Li

发表于:2019-02-06 / 阅读(129) / 评论(0)

阅读空间

每天两餐西红柿永葆肌肤年轻

At this rate, scientists will have to come up with a better description for the tomato than mere 'superfood'. While it has long been credited with cutting cholesterol and preventing some cancers, the fruit now appears to have two more healthgiving be

发表于:2019-02-06 / 阅读(78) / 评论(0)

阅读空间

2015十大新兴技术：未来会有多酷炫？

The 2015 list of the greatest emerging technologies was recently published by Bernard Meyerson, chief innovation officer of IBM and chair of the World Economic Forums Meta-Council on Emerging Technologies. 最近IBM的首席创新官兼世界经济论坛

发表于:2019-02-17 / 阅读(99) / 评论(0)

阅读空间

Lesson 18-1:Money 钱

Listen to the dialogues and write down how much money they've paid for the bill. 英语对话1 A:Jack, here comes the utility bill. B:How much should we pay for this month? A:Including gas and water we should pay 700 dollars.But, the electricity fee

发表于:2019-02-17 / 阅读(79) / 评论(0)

英语听力练习题

关于水电的十句基本日常口语

1. The power is off. 停电了. 2. The power is back on. 电又回来了. 3. Please turn off the power. 请把电源关掉. 4. Throw the power on. 打开电源. 5. The power is running low. 快要没电了. 6. I was shocked. 我被电到了。 7. Is

发表于:2019-02-18 / 阅读(103) / 评论(0)

英语口语

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

allowable limited amount of dangerous cargo