标签：nutrient 相关文章
Experimental Treatment Targets Drug-Resistant Bacteria You probably have heard about the Trojan Horse. Tradition says the ancient Greeks used a large wooden horse to trick enemy forces and capture the city of Troy. Now, researchers say a similar plan
2018年VOA慢速英语(十)月
Idiom: Long face ( look serious ) Hit the book: So is it good or bad to eat the same stuff every day? If you're thinking a bagel for breakfast, sandwich for lunch, and meat with potatoes and a salad for dinner, you're surely going to be deficient in
趣味青春英语
In the Rocky Mountains of Central Colorado, the forces of nature create a landscape of alpine lakes, high-altitude ponds teeming with life and mountain meadows bursting with wild flowers. It is amidst these beautiful wildflower fields that one scien
国家地理2008年
Russians Accused of Poisoning Former Spy Appear on Russian TV Two men sought by Britain for the poisoning of a former Russian spy and his daughter appeared on Russian television Thursday. They denied involvement in the attack. 涉嫌向前俄罗斯间谍
2018年VOA慢速英语(九)月
Vitamin D is an essential nutrient that we get through exposure to sunlight and through diet. Without enough Vitamin D, we are at risk for rickets, osteoporosis and bone fractures. Now, researchers have found that Vitamin D deficiency is also associa
VOA标准英语2010年(三月)
AS IT IS 2015-05-03 Hippos: The Life Force of African Rivers 河马:非洲河流的生命力量 The hippopotamus is an animal very important to the health of Africa's rivers and lakes. Their dung, or solid waste, helps Africas aquatic ecosystem. But
2015年VOA慢速英语(五)月
AS IT IS 2015-03-15 Saharan Dust Feeds Amazon Rainforest 撒哈拉沙漠的尘土吹到亚马逊雨林 Large clouds of dust blowing off the Sahara desert can easily be seen from space. Joseph Prospero is with the University of Miami in the United Sta
2015年VOA慢速英语(三)月
Some Fatty Foods Trigger Natural High Ever wonder why foods that are bad for you - such as fat-laced potato chips and French fries - taste so good? It turns out they follow the same pleasure-inducing biochemical pathways through the body as marijuana
VOA标准英语2011年(七月)
Stem cells are prised for their ability to give rise to a variety of specialized cell types, including heart, liver, nerve and bone. Unfortunately, it's the stem cells from embryos that have shown the biggest potential, for generating both a range of
Scientific American(六)月
台湾籍旅美老师今天交给我们的句子是： I learned that what mattered most about one's health was not necessarily the nutrients, good or bad, that you were consuming or staying away from, or even the calorie counts. 我认识到对人体健
留美老师带你每日说英文
> 29 大城市对周围农村农作物生长的影响 DATE=5-29-01 TITLE=AGRICULTURE REPORT - Pollution and Crops BYLINE=Jill Moss （Start at 59
自然探索
Sharks aren't typically thought of as vegetarians. Or even omnivores. But about 10 years ago, scientists documented a dainty relative of the hammerhead shark, known as a bonnethead shark, consuming copious amounts of seagrass. 锤头鲨通常不被认为
2018年科学美国人10月
isolated adj. 孤立的 jurisprudence n. 法学 lander n. 登陆者 latitude n. 纬度 launch n.v.发射（导弹、火箭等） layperson n. 外行 lichen n. [植]青苔，地衣 locale n. 场所 LR=
英文语法词汇
The lifestyle that we see in pandas is quite enviable to many of us as all they do is eat and laze around in places. So basically all they do is eat and relax all day long. 我们当中的许多人对于熊猫的生活方式非常羡慕，它们基本上
阅读空间
Voice 1 Welcome to Spotlight. Im Rebekah Schipper. Voice 2 And Im Liz Waid. Spotlight uses a special English method of broadcasting. It is easier for people to understand, no matter where in the world they live. Voice 3 I feel tired all the time. Voi
环球英语 Spotlight
Because chlorophyll is the chemical responsible for making leaves green, its absence allows chemicals such as carotinoids, xanthophylls, and others to give leaves their orange, yellow, and various other colors. As trees stop producing chlorophyll, th
英语时差8，16
Can you imagine a world where more than half of our common plant species and a third of our known animals disappear from sight? That's the scenario suggested by new research on the impact of climate change. An international team of researchers looked
英语听力精选进阶版
台湾籍旅美老师今天交给我们的句子是： Not only does it help the human body to bring oxygen and nutrients to the cells, regulate body temperatures and aid metabolism, but it flushes waste out of the body. 它不止帮助人体携带氧气
留美老师带你每日说英文
Meet Chang Chen-kai, one of a new generation of high-tech farmers in Taiwan. Rather than toiling in the fields, Chang works in an air-conditioned room at a plant factory operated by Taiwanese biotechnology company, ARWIN. It's one of a growing number
2015CRI中国国际广播电台
台湾籍旅美老师今天交给我们的句子是： With the advent of freezers, we're able to keep our food lasting longer than ever before. But is there a difference between fresh and frozen produce in terms of nutrition? Which should you be eat
留美老师带你每日说英文