标签：tract 相关文章
Researchers say a pill could soon send radio signals from inside your stomach to help doctors recognize signs of disease. Scientists have developed a small pill for patients to swallow. It mixes synthetic biology and electronics to find bleeding in t
2018年VOA慢速英语(六)月
Have you ever been bitten? Of course you have. You are surrounded by creatures that might, or do, bite. Even as you rest your head on your pillow, bedbugs are probably nibbling away at you. They live happily inside most pillows. Take a walk outside a
原版英文小故事
This is a season when becteria sinus infections run rampant, but some people are better able to ward off that malady. And they can be identified by their taste buds, because those of us who can better detect bitter flavors may also be better equipped
Scientific American(十二)月
Beatboxing, as musician Tom Thom was doing in that last example, uses the voice to mimic an incredible range of percussion instruments, from drums, and symbols to records scratches and digeridjuz. But to make such well, inhuman sounds, the performer
2014年Scientific American(一)月
When you go back to work or class after lunch, why is it so hard to stay awake? 当我们用完午餐回去工作或上课时，为什么很难保持清醒呢？ Although we get energy from food, we also use lots of energy to digest it. Your energy u
初学者听力文摘精选
77. King Philip's War, 1675-76. 77．金菲利普的战争（1765~1776年） It was not only in Virginia and Maryland that the Indians were restless at this time. 这个时候，并非只有在弗吉尼亚和马里兰的印第安人不安于现状，
美国学生历史
95. Founding of Louisiana. 95．创建路易斯安那 La Salle named this immense region Louisiana in honor of the French king. 为了纪念法国的国王， 拉萨尔把这片广袤的地区命名为路易斯安那。 He soon led an expedition to p
美国学生历史
174. Claims to Western Lands. 174．西部土地的主权 The Confederation seemed to be falling to pieces. 联邦似乎要四分五裂， That it did not actually fall to pieces was largely due to the fact that all the states were interested in the
美国学生历史
I led the Canadian to the room where the Nautilus's men were putting on their diving suits. 我带加拿大人到诺第留斯号的船员穿潜水衣的房子中。 I informed the captain of Ned's proposition, which was promptly accepted. 我把尼德兰
《海底两万里》中英双语有声读物
Grammar Girl here. Todays topic is when a consonant is a vowel. When I was out on my book tour, someone at the Third Coast Coffee Roasting Company in Austin asked me whether the w is ever a vowel. I was stumped, but I promised to look into it. Guest-
英语语法 Grammar Girl
This is the VOA Special English Health Report. Hospitals not only treat infections -- they can also cause them. In the United States alone, the number of infections in hospitals is estimated at close to two million each year. About one hundred thousa
2010年VOA慢速英语(四)月
AS IT IS 2016-08-05 Spread of Disease Linked to Sandstorms in Sahel 萨赫勒疾病的传播或与沙尘暴有关 Sandstorms are a major part of life in the Sahel area in Africa. 沙尘暴是非洲萨赫勒地区常见的天气。 The Sahel stretches
2016年VOA慢速英语(八)月
Charities Get Creative to Attract Donors December is traditionally a season of giving but the current economic downturn has some U.S. nonprofits getting creative to inspire contributions from donors - and that means everything from banding together t
VOA标准英语2011年(十二月)
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)
A: My wife thinks I should get a lawyer to look at the contract. B: Well, it certainly wouldnt hurt to have a lawyer review it. A: How much does a lawyer cost? B: I dont know. A good real estate lawyer might cost $400 an hour. A: That cant be legal!
卖房英语情景对话
Fecal Transplants Used to Cure Intestinal Disorders 粪菌移植可治肠道疾病 粪菌移植是指将健康人粪便中的功能菌群，移植到患者胃肠道内，重建具有正常功能的肠道菌群，实现肠道及肠道外疾病的诊疗。
VOA常速英语2013年(八月)
The whole had the appearance of a broad, beautiful tract of pasture land, 牧场景色美丽寥廓，和谐安谧， on the highly ornamented estate of some gentleman farmer, with his cattle grazing about the lawns and meadows. 宛如不失绅士优雅
美国语文第五册
Part 3. Lifestyle and environmental factors versus cancers. Keywords. factors, control, cancer cases, list of causes, life style and environmental exposures, best option. Vocabulary. bladder, cervix, pancreas, digestive tract, speculate. A. You're go
Step by Step 3000 第二册
A: What is that plastic cup for? B: Your doctor has requested a urine sample. A: Am I supposed to pee into the cup? B: We want what we call a clean sample. Urinate a drop or so into the toilet, and then stop the flow and urinate into the cup. A: Then
健康-Health
Now heres the strange part. About once a week, as garden snails share caresses, pressure builds up in the area surrounding a sac near the genital region housing a calcium dart. Just for the moment of sexual penetration, the impregnating snail stabs i
英语时差8，16