单词：optimal gestation period
单词：optimal gestation period 相关文章
Since the 1980s, millions of American women have used fertility treatments, including the implantation of embryos, to become pregnant. But the process is expensive, averaging $12,000. Earlier this month, Reveal, part of the Center for Investigative R
PBS访谈健康系列
Hows this for a possible new culprit for breast cancer sufferers: they may be able to blame their grandmas diets. Thats the implication of a study done with rats. Researchers affiliated with the Georgetown University Medical Center fed a group of pre
Scientific American(四)月
American black bears appear in a variety of colors despite their name. In th eastern part of their range, most of these bears have shiny black fur, but in the west they grow brown, red, or even yellow coats. To the north, the black bear is actually g
英语听力小短文走遍全世界
Diabetes is the 7th leading cause of death in the US. 糖尿病为美国第七大致死疾病。 Over 90% of cases are type 2. 超过90%病例为2型糖尿病。 Risk factors include older age, obesity, family history of diabetes, gestational diabete
医学英语轻松学
The waves of these azure seas hide an abundant treasure. Below the waves, coral reefs provide a habitat for teeming life, a life with a kaleidoscope of color. In oceans around the world, clear and well-circulating waters encourage corals to anchor a
国家地理2008年
Transsexuality is an interesting, if baffling, subject for most people. It is often confused with transvestitism, even though the two are distinctly different. Transvestites feel a compulsion to dress
有声英文阅读
1. President Bush and British Prime Minister Gordon Brown agree fighting terrorism is a top priority. The two leaders met at Camp David for the first time since Brown took office, replacing Bush's longtime ally Tony Blair. In addition to policy talks
美联社新闻一分钟2007
1. A violent day in Iraq during the holiest day in the Shiite calendar. At least 44 people were killed in a wave of violence striking several cities. Gunmen ambushed this bus carrying pilgrims, killing at least 7. 2. Barbaro could be laid to rest at
美联社新闻一分钟2007
A new study suggests that extreme malnutrition early in pregnancy may put a child at risk for Alzheimer's Disease decades later. The study begins not in the laboratory, but in the Netherlands during World War II. At the end of 1944, Nazi occupation f
VOA标准英语2010年(九)月
American black bears American black bears appear in a variety of colors despite their name. In the eastern part of their range, most of these brown, red, or even yellow coats. To the north, the black bear is actually gray or white in color. Even in t
英语小短文
By Carol Pearson Washington 26 March 2008 Pre-term or prematurebirth is one of the leading causes of infant death in the developed world. A new study shows that babies born before 37 weeks of gestation not only have lower survival rates, but they fac
VOA标准英语2008年（三月）
Rate of Premature Births Rising Worldwide The birth of a child....what should be a joyous experience, too often ends in death if that child is born prematurely in a developing country. A major report about premature delivery called Born Too Soon show
VOA标准英语2012年(五月)
If you grew up with a brother or sister, you probably know what sibling rivalry is like. For a spotted hyena though, sibling rivalry is a matter of life and death. Spotted hyena mothers usually have twins. They give birth in a private burrow where th
英语时差8，16
Living the Prolific Life: A How-to Guide Prolific (pr?-li-fik) : Marked by abundant inventiveness or productivity. Merriam Webster Online The prolific life has been characterized by abundant inventiveness and limitless creativity. Prolificacy has als
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妊娠糖尿病与心脏疾病有关 WASHINGTON, March 12 (Xinhua) -- Women who develop gestational diabetes may face an increased risk of early heart disease later in life, even if they do not develop diabetes subsequent to their pregnancy, U.S. res
英语新闻
Yael: They say that no two fingerprints are alike, but my daughter's fingerprints sure look similar to mine. Don: While the intricate details of an individual fingerprint are unique, pattern types and the overall size, shape, and spacing of the ridge
英语时差8，16
American black bears American black bears appear in a variety of colors despite their name. In the eastern part of their range, most of these brown, red, or even yellow coats. To the north, the black bear is actually gray or white in color. Even in t
双语有声阅读
International 国际 Prizing Girls: Like Father, like daughter 珍惜女儿：有其父必有其女 How South Korea learnt to love baby girls. 韩国是怎么学会爱女婴的。 I cried when I heard, writes one blogger, recalling the moment she lea
经济学人综合
so now, Starbuck saw long coils of the umbilical cord of Madame Leviathan, by which the young cub seemed still tethered to its dam. 这时，斯达巴克所看到的，就是这般情况。原来是一条鲸太太的一大卷脐带，而那条小鲸似
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