单词:secretions
n. a functionally specialized substance (especially one that is not a waste) released from a gland or cell
单词:secretions 相关文章
Why Does Crying Make Your Nose Run? When you burst out crying, you expect the bleary red eyes and the rivers of tears that stream down your cheeks. But on top of all that, your nose starts to run like a faucet. Why does this happen? Whats the connect
There is one thing that everyone on earth has in common. We all live, eat and breathe within the human body. For two years I’ve been exploring this unique dwelling place. I want to show you what I'v
The Next 'Wonder Drug' Is ... a Maggot? From VOA Learning English, this is the Health Lifestyle report. The next superhero that saves the world may not be strong, powerful or good-looking. In fact, that hero may be a wriggling, squirming faceless cre
Study: Give ARVs After Male Circumcision Male Circumcision has been proven to slow the spread of HIV/AIDS in Africa. But a new study shows that in the short-term the surgical technique could actually increase the risk of infection for female partners
This is Scientific American 60-second Science.I'm Steve Mersky.Got a minute? People have been leaving messages on bathroom walls for thousands of years,just google'ancient Roman bathroom graphy'.Well,we are not the only ones to use the ? for informat
Why Does Crying Make Your Nose Run?哭的时候为什么会流鼻涕? When you burst out crying, you expect the bleary red eyes and the rivers of tears that stream down your cheeks. But on top of all that, your nose starts to run like a faucet. Why d
Why Does Crying Make Your Nose Run? When you burst out crying, you expect the bleary red eyes and the rivers of tears that stream down your cheeks. But on top of all that, your nose starts to run like a faucet. Why does this happen? Whats the connect
Health Report - What Do You Know About the Common Cold? This is the VOA Special English Health Report. 这里是美国之音慢速英语健康报道。 Do you think getting cold can give you a cold? Is it bad to drink milk when you have a cold? Can c
Banana Protein May Be Virus Killer 香蕉的蛋白质或是病毒杀手 From VOA Learning English, this is the Health Lifestyle report. 这里是VOA健康生活频道 Bananas are often called the perfect food. 香蕉一直都是完美食物 They are
By Alisha Ryu Nairobi 23 August 2007 Medical researchers studying the recent outbreak of Marburg hemorrhagic fever in Uganda say common bats are the most likely source of the outbreak. VOA Correspondent Alisha Ryu in our East Africa Bureau in Nairobi
Keeping a pet cat puts owners at greater risk of going blind, but a dog appears to protect eyesight, a new study suggests. 一项最新研究表明,养猫会增加主人失明的风险,但是养狗却能保护主人的视力。 Scientists have di
Scientists have long known that the skin of frogs contains plenty of powerful germ-fighting substances because of the hostile environments they exist in. 科学家很久以前就知道,由于生存环境恶劣,青蛙的皮肤中含有大量能够对
But they can't migrate to greener pastures until the last of the youngsters has been winged. So mother has become stingy and edgy. Readying for the migration ahead, she tongues oily secretions over every bit of her flight equipment. A bat's wings are
When Marmoset s Think About Love 小猴子表达如何爱 狨猴( Marmoset ),又称指猴,是生活在在南美洲亚马逊河流域的森林中的一种世界上最小的猴子。这种猴长大后身高仅1012厘米,重80100克。新生猴只
The Resident World Controller's Second Secretary had asked her to dinner and breakfast. 驻跸总统的第二秘书请她去用过晚宴,吃过早饭。 She had spent one week-end with the Ford Chief-Justice, and another with the Arch-Community-Son
一次咳嗽会产生2万个病毒 The next time you cough or sneeze, there is good reason to cover your mouth. As many as 20,000 viruses are expelled in an average cough, which may be sufficient to infect many people - particularly those who are not
Over the next five minutes, 在接下来的5分钟里 my intention is to transform your relationship with sound. 我想把你们与声音的关系作个转变 Let me start with the observation that most of the sound around us is accidental, 首先,请
灰蝶与蚂蚁双赢原则 The Special Relationship Between Ants and Lycaenid Butterflies The Lycaenids are a group of butterflies known commonly as blues, coppers and hairstreaks. Most species of Lycaenid butterflies have evolved close, mutually- b