标签：区域生态环境 相关文章

麻省理工学院公开课：单变量微积分27：参数方程、弧长和表面积

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

发表于:2018-12-09 / 阅读(267) / 评论(0) 分类 麻省理工学院公开课：单变量微积分

VOA常速英语2016--阿富汗安全部队收复失地

阿富汗安全部队收复失地 A military offensive against Islamic State in the Nangarhar's Achin district continued Friday for a fourth day, clearing areas once under IS control. 周五，政府军继续在楠格哈尔省亚珍区打击伊斯兰国

发表于:2018-12-16 / 阅读(51) / 评论(0) 分类 VOA标准英语2016年(二月)

美国有线新闻 CNN 夏威夷火山熔岩切断公路 烟雾笼罩周边区域

First today on CNN 10, a special weather statement for part of Hawaii. It's not rain. It's not storms. It's ashfall from the erupting Kilauea volcano that's likely in the southern part of Hawaii's big island. 今天CNN10分钟新闻首先来关注夏威

发表于:2018-12-20 / 阅读(55) / 评论(0) 分类 CNN美国有线新闻2018年7月

VOA常速英语2013--叙利亚暴发脊髓灰质炎引发区域传播恐惧

Polio Outbreak in Syria Prompts Fears of Regional Spread 叙利亚暴发脊髓灰质炎引发区域传播恐惧 LONDON An outbreak of polio among children in Syria has the potential to spread rapidly, doctors are warning. It is Syrias first polio out

发表于:2019-01-03 / 阅读(55) / 评论(0) 分类 VOA常速英语2013年(十一月)

VOA标准英语2014--埃博拉感染区域图或能帮助阻止未来爆发

Ebola Map May Help Stop Future Outbreaks 埃博拉感染区域图或能帮助阻止未来爆发 Oxford University scientists have developed a map of areas where animals are likely to be infected with the Ebola virus and they say its a first step towa

发表于:2019-01-14 / 阅读(64) / 评论(0) 分类 VOA标准英语2014年(九月)

VOA标准英语2015--区域冲突和气候影响食品安全

Conflict, Climate Affect Food Security 区域冲突和气候影响食品安全 A new report says there were both advances and setbacks in food security in 2014. Poverty was reduced last year and the number of hungry people declined. However, conflict

发表于:2019-01-14 / 阅读(49) / 评论(0) 分类 VOA标准英语2015年(三月)

科学美国人60秒 SSS 宇航员的大脑变化

Time spent in zero G changes the body: Astronauts come home with bone loss and muscle weakness. But what happens in their heads? To find out, researchers examined MRIs of astronauts brains taken before and after flight. They looked at 12 astronauts w

发表于:2019-01-20 / 阅读(83) / 评论(0) 分类 2017年Scientific American(二)月

英语听力文摘 English Digest 499、教育孩子影响大脑？

How Parenting Affects the Brain 教育孩子影响大脑 If youre one of those parents that constantly worries about their kids, youre not alone. In fact, a study out of Yale University suggested that having a child may actually affect your brain fun

发表于:2019-01-26 / 阅读(53) / 评论(0) 分类 英语听力文摘 English Digest

VOA标准英语2013--世界银行区域健康报告

World Bank Issues Regional Health Reports 世界银行区域健康报告 The World Bank has released new reports outlining the health challenges facing six major regions. Those challenges include not only many types of disease, but road accidents as

发表于:2019-02-01 / 阅读(41) / 评论(0) 分类 VOA常速英语2013年(九月)

科学美国人60秒 SSS X射线可能照射到一些可居住外行星区域

Some Habitable Zone Exoplanets May Get X-Rayed Out X射线可能照射到一些可居住外行星区域 As astronomers hunt for habitable, Earth-like worlds, one popular place to look is around M stars, a type of red dwarf. Couple reasons for that: 当

发表于:2019-02-14 / 阅读(56) / 评论(0) 分类 2018年科学美国人4月
最新学习文章
热门学习文章