[无化] 氢氰酸

This is Scientific American's 60-Second Science. I'm Karen Hopkin. This will just take a minute. As Valentines day approaches, remember, its the thought that counts. Just ask a decorated cricket. Because according to a study published in the January

发表于:2018-12-24 / 阅读(85) / 评论(0) 分类 Scientific American(一)月

This is Scientific Americans 60-Second Science. Im Karen Hopkin. This will just take a minute. Many of the key molecules for life have a specific direction, or handedness: DNA twists to the right, amino acids to the left. Now scientists at the Nation

发表于:2018-12-24 / 阅读(65) / 评论(0) 分类 Scientific American(四)月

Why does Florida have so many springs? Florida sits on a layer of porous limestone which acts as an underground reservoir or aquifer. This aquifer can absorb huge amounts of water. Where the pressure is great enough, springs bubble up, spewing up bil

发表于:2018-12-26 / 阅读(71) / 评论(0) 分类 自然百科2009年

The Chinese began to it laver more than 1,000 years ago. 在中国吃紫菜已经有一千多年的历史 It is usually used to make soup. 最常见的吃法是用来做汤 The secret of its flavor-enhancing effect lies in its rich amino acids includ

发表于:2018-12-28 / 阅读(64) / 评论(0) 分类 舌尖上的中国第一季

How does acid deposition affect human health? We eat food, drink water, and breathe air that has come in contact with acid deposition. Canadian and U.S. studies indicate that there is a link between t

发表于:2019-01-02 / 阅读(242) / 评论(0) 分类 知性英语

AGRICULTURE REPORT - Legumes: Good for People and SoilBy Bob Bowen Broadcast: Tuesday, February 21, 2006 I'm Steve Ember with the VOA Special English Agriculture Report. Many different kinds of plants

发表于:2019-01-02 / 阅读(50) / 评论(0) 分类 2006年慢速英语(二)月

From VOA Learning English, this is the Health Lifestyle report. Nearly 790 million people around the world do not get enough to eat. Most of them live in developing countries. Many parts of the developing world do not have transportation systems in p

发表于:2019-01-02 / 阅读(117) / 评论(0) 分类 2017年VOA慢速英语(六)月

By Nancy Steinbach Broadcast: July 30, 2003 This is Bill White with the VOA Special English Health Report. A medical study says foods rich in a kind of fat may help prevent Alzheimer's disease. Alzhei

发表于:2019-01-07 / 阅读(130) / 评论(0) 分类 VOA2003(下)-环境与健康

This is Scientific American's 60-Second Science. I'm Karen Hopkin. This will just take a minute. In 1953 a student named Stanley Miller did an experiment showing that the simple chemicals present on the early Earth could give rise to the basic buildi

发表于:2019-01-08 / 阅读(82) / 评论(0) 分类 Scientific American(十)月

The early Earths oceans were home to a lot of interesting chemistry. Now scientists have found that amino acids thought to be present way back when could have been cooked into other compounds vital for lifean idea you should take with a grain of salt

发表于:2019-01-08 / 阅读(54) / 评论(0) 分类 Scientific American(九)月

Scientists say that omega-3 fatty acids in fish oil can help people with heart disease live longer. But until now, no one knew why omega-3 oils are so beneficial. This is what coronary artery disease looks like. Plaque builds up inside the coronary a

发表于:2019-01-13 / 阅读(61) / 评论(0) 分类 VOA标准英语2010年(一月)

If you sucked all of the moisture out of your brain and broke it down to its constituent nutritional content, what would it look like? 如果将你大脑里所有的水分都吸干,然后按不同的营养成分进行分类,会是怎样呢? Mos

发表于:2019-01-17 / 阅读(84) / 评论(0) 分类 TED演讲教育篇

Olive oil is 100% fat; there's nothing else in it. 橄榄油含有100%的脂肪,除此之外没有别的。 Pancake mix, on the other hand, is only about 11% fat. 相反,煎饼只有约11%的脂肪。 And, yet, olive oil is good for you, and panc

发表于:2019-01-17 / 阅读(72) / 评论(0) 分类 TED演讲教育篇

AGRICULTURE REPORT - Scientists Clone Pigs to Make Omega-3 Fatty AcidsBy Mario Ritter Broadcast: Tuesday, April 04, 2006 I'm Faith Lapidus with the VOA Special English Agriculture Report. Scientists s

发表于:2019-01-30 / 阅读(71) / 评论(0) 分类 2006年慢速英语(四)月

AGRICULTURE REPORT - Vitamin E and Poultry Health By Mario Ritter Broadcast: Tuesday, August 17, 2004 This is Steve Ember with the VOA Special English Agriculture Report. Researchers say extra vitamin

发表于:2019-01-30 / 阅读(91) / 评论(0) 分类 农业与发展

STEVE EMBER: This is the VOA Special English program SCIENCE IN THE NEWS. I'm Steve Ember. BARBARA KLEIN: And I'm Barbara Klein. This week, we will tell how less salt can lead to better health. We will also tell about the helpful effects of omega-thr

发表于:2019-01-31 / 阅读(86) / 评论(0) 分类 2010年慢速英语(二)月

You need to take proper care of your eyes to maintain good eyesight. There are few fundamental rules that have to be done for good eye care. As you know very well that exposure to sun is very bad for the eyes. Similarly, if you use computer for long

发表于:2019-02-09 / 阅读(139) / 评论(0) 分类 英语小短文

There are actually twenty-two naturally occurring amino acids known on Earth, 实际上,地救上有22种天然存在的氨基酸, and more may await discovery, but only twenty of them are necessary to produce us and most other living things. 更多

发表于:2019-02-17 / 阅读(60) / 评论(0) 分类 万物简史

Proteins are what you get when you string amino acids together, and we need a lot of them. 你把氨基酸串在一起,就得到了蛋白质。我们需要大量的蛋白质。 No one really knows, but there may be as many as a million types of pro

发表于:2019-02-17 / 阅读(47) / 评论(0) 分类 万物简史

Eating a small steak every day could be as good for you as stopping smoking, scientists say. 科学家说,每天吃一小块牛排可以像戒烟一样对你有好处。 People who eat lots of protein-rich food were found to have lower blood pressu

发表于:2019-02-18 / 阅读(324) / 评论(0) 分类 阅读空间
学英语单词
?-estradiol
abdominal nephrotomy
Abu Kū'
aicf
ALCT
anecophyte
arvideserta
azura
bartramias
be big of sb
belleisle
beni mazar (bani mazar)
Besinc function
Blyth
bottle-nosed dolphins
butt resistence welder
chirre
circleout
cod-liver oils
collective theft
compass locator
conditions sheet
coumter
cramesy
cycle, design
dienyne
doubt a person's truth
ectinohoplia formosana formosana
enclosed-welding
equipollence
especally
exchange-based
fibrillating current
fire crotches
flag state jurisdiction
floreys
four force
genus menziesias
give an impression of
gotten cold feet
ground-working disk blade
he-haw
homologus chromosome
homopolar HVDC system
Hunwick
idosaccharic acid
incisive fossa
International Express Carriage by Air
isothermal transforma-tion
jbas
koelliker's interstitial granules
lacquer for floor
landing ship medium (lsm)
liftbridge
ligamentum corniculopharyngeum
lined ring
loading and unloading capacity
male center
masculinizing
memory bus
metatarsal tunnel syndrome
Moygashel
Nasopharyngogram
nefertitis
Neuenburg am Rhein
neuropeptidomes
parlement
patrilineal succession
pilis simplices
piperidolate
plessinger
polyphase phase comparator
psychotoxicity
Radix Dipsaci
random web
recognition service
reproductive death
Richardson's sign
ring multiplication
schimmel
service-related
shikimi
short range ballistics
shrog
silybum marianums
skinflick
sod layer
specialty of supplication
St Croix County
storage means
sucking solenoid
syringa spp
timur lenks
triclinic symmetry of fabric
uk team
union cashimere
urethral gland
Utah County
VFCT
wild beast
xanthocarpous
young-adult