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The gas given off contains two carbon isotopes.释放出的气体包含两种碳同位素The ratio of one to the other will indicate两种同位素之间的比例可以说明whether our ancestors were foraging in woods我们的祖先是在森林中觅食or going out to the grass-rich plains.还是去绿草如茵的平原觅食The result will reveal the sort of food eaten by ancient humans结果将揭示古人类食用食物的种类and the environment in which they lived.以及他们所生存的环境So far, Julias research has revealed迄今为止 朱莉娅的研究表明that in the period leading up to the evolution of habilis,我们祖先在进化成能人之前there was a massive change in the lifestyle of our ancestors.生活方式发生了巨大变化The results tell us that our ancestors changed结果告诉我们人类祖先from a forest-orientated kind of diet and environment,从森林导向的饮食起居方式to one which concentrated on the grasslands.向草原导向的生活方式转变Its telling us that our ancestors ate由此我们知道他们animals which ate the grasses.曾食用食草动物But its not just the tooth enamel但不仅仅牙釉质which shows a change in the diet of our ancestors -显示了我们祖先的饮食变化its the tooths shape itself which shows牙齿形状本身也给出了clues as to what they ate.他们食用何物的线索201504/371836

In this presentation you will learn how to and understand a nutrition facts label本讲你将了解如何阅读理解营养标签this slide shows an example of the nutrition facts label for a box of macaroni and cheese.这张课件显示的是一张通心粉奶酪盒子上的营养标签The US food and drug administration dictates that美国食品及药物规定food labeling is required for most prepared foods such as bs, cereals, canned and frozen foods,大多数预加工食品,如各种面包,谷类食品,灌装及冷冻食品snacks, deserts, drinks and many more.小吃,点心,饮料等都需要提供食品标签However nutrition labeling for raw produce such as fruits and vegetables and fish is voluntary.然而未加工产品如蔬菜水果鱼等营养标签则不是必须的Dietary supplements and vitamins have separate labeling requirements食物强化剂和维生素都需要营养标签and will not carry a nutrition facts label that looks like the one you see here.但并不是你在这里看到的这种营养标签Nutrition facts labels will all have the same format with several sections as those outlined here.营养标签与这里展示的这几部分格式相同Next we will discuss the different sections of a food label.下面我们就讨论一下食物标签的不同部分But you should know that each nutrition facts label但是你应该知道每种营养标签has specific information about the food product on which it is labeled.都提供了其标注食物的特定信息You can think of a food label as having six sections你能够想到食物标签包含六部分serving size, calories, two sections for nutrients, a footnote and a percent daily value.食用分量,热量,两部分营养物质,补充说明和每日摄入百分比On the next slide you will see the food label with each of these sections.下张课件你将看到食品标签的这些部分The serving size is at the top of the label and is in a green color.位于标签最顶部的绿色区域是食用分量Calories are shown just below the serving size at the top of the label热量一栏仅位于最顶端的食用分量下边and in our example will be in a white coulour.在此例中为白色区域Both sections of the nutrients are below the calories and in our example are highlighted in yellow and blue.两栏营养物质都在热量栏下面,即例中的黄色和蓝色区域The footnote is located at the bottom of the food label in white补充说明位于食品标签最底部的白色区域and the percent daily values are given on the far right of the column and highlighted in purple on our example.而每日摄入百分比则在该栏的最右侧,即例子中的紫色区域You should note that你应该已发现food labels on products are only displayed in black and white with no colours.商品的食物标签只有黑白色Here you can see the six sections pointed out on the previous slide这里你可以看到上张课件中讲到的食物标签六部分serving size at the top in green calories最顶部的绿色区域是食用分量just below the serving size in white,下面的白色区域表示热量two sections for nutrients in yellow and blue a footnote in white at the bottom营养成分的两部分分别为黄色和蓝色,最下边的白色部分是补充说明and the percent daily value on the right hand side highlighted in purple.而右手边的紫色区域是每日摄入百分比Next we will walk through each of the six sections下面我们将一一介绍这六个区域201603/428982

The ed Nations has been issuing some dire warnings this week about the worsening humanitarian situation in Libya.联合国本周就利比亚人道主义局势的恶化发出迫切警告。The UN’s humanitarian coordinator has told euronews it’s a disaster which threatens to get worse and the organisation only has a tiny fraction of the funds it needs.联合国人道主义协调员告诉欧洲新闻台,事态很糟糕而且在加剧,组织只拥有需要资金的一小部分。Hundreds of thousands of people have been displaced by the fighting and by the presence of so-called Islamic State; many others don’t have access to proper nutrition; medical supplies are running out.战争和所谓的“伊斯兰国”造成成千上万的人流离失所,许多人没有获得适当的营养,医疗用品已经耗尽。There are 2,400.000 people, Libyans and non-Libyans, in need of immediate humanitarian aid in Libya. The ed Nations estimates it can respond to 1,300.000.有240万人,包括利比亚和非利比亚人,在利比亚需要紧急人道主义援助。联合国估计可以响应130万人。The real problem we face today is the lack of sufficient financial resources to implement a humanitarian response. Today we have available only four percent of the financial resources we need.我们今天面临的现实问题是,缺乏足够的财政资源来实施人道主义。今天我们只有百分之四的财政资源。While attempts to reach a political resolution have hit obstacles, the UN says a needs of 150 million euros for humanitarian relief.尽管达成政治解决方案的尝试遭遇障碍,联合国称需要1亿5000万欧元的人道主义救援。It goes on to warn that if the international community doesn’t respond immediately, the consequences will be felt not just in Libya but in other countries too.如果国际社会没有立即作出反应,其后果将不仅仅是在利比亚,也波及其他国家。译文属。 /201602/428120

栏目简介:《外国人在北京》是英语视频听力下面的子栏目,节目关注在北京生活的外国人的时尚新生活。话题紧紧围绕网络生活,每日的话题内容按照网络热门固定划分为家居、汽车、数码、饰美容、健身、交友、美食等,了解外国人生活的同时通过网络互动提供一个中外人士互相帮助的平台。201512/407594


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