Because the canyon's environments are so different, these species did not spread beyond the canyon, or even far within it.
VOA: special.2009.10.07
Whereas in molecular orbital theory, what I'm telling you is instead we understand that the electrons are spread all over the molecule, they're not just associated with a single atom or a single bond.
而在分子轨道理论里,我要告诉你们的时,我们任为电子分布在整个分子中,它们不仅仅是和,一个原子或者一个键有关。
Anytime there's a risk that hits one person or one country the financial markets would spread it out over everybody and it gets very small.
如果有风险袭击一个人或者一个国家,金融市场就会将风险分摊到所有人身上,风险就变得微乎其微。
The World Health Organization this week declared the first pandemic, or worldwide spread, of influenza in forty-one years.
VOA: special.2009.06.13
They're all over each other sometimes and they can spread saliva or other fluids.
有时候他们会在一起追跑打闹,病毒和疫苗可以通过唾液或其它体液传播
They spread through the air when the person coughs or sneezes or even sings and talks.
VOA: special.2009.03.25
How diseases spread, how they can be treated or cured, when they kill somebody.
病情如何蔓延,应该怎样治疗或治愈疾病,它们什么时候会置人于死地
Infection can spread through touching an infected surface and then touching your eyes, nose or mouth.
VOA: special.2009.07.14
They will only put it out if it's a fire in the home of a subscriber or if it starts to spread and to threaten the home of a subscriber.
他们只扑灭发生在会员家里的火灾,或者是即将蔓延到他们会员家里的火灾。
They depend on birds,bees or insects to spread their pollen to another orchid flower.
VOA: special.2010.04.06
In product placement, you might think when you're placing a gas station, you might think it would be nice if gas stations spread themselves evenly out over the town or out over the road.
在产品植入领域里,假设你在考虑设立一个加油站,你会想如果加油站,能均匀覆盖城镇每个角落,或者遍布整条公路那该多好
Most efforts to curb their spread have failed, and many people resort to killing the toads with poison gases or by freezing them.
VOA: standard.2010.02.07
But in any event, the vaccine is intended to stimulate the immune system to produce an effector response— either antibodies or specific cells— that can combat spread of the microorganism through your body.
但无论如何,疫苗是通过,刺激免疫系统来使身体产生应答,无论是抗体还是特定的细胞,都可以阻止微生物在体内扩散
"For the health sector, it will be to be ready to cope with a disease, which will spread in areas where they do not spread or which may become more serious,".
VOA: standard.2009.08.30
If a case of polio emerged in the community, the chances that it could spread to other children or to your child were high; so, great interest in this in the early part of this century.
如果在某个社区出现一例脊髓灰质炎患儿,那么你的孩子或者更多别的孩子,被传染的几率非常高,所以 二十世纪初的科学家们,热衷于研究脊髓灰质炎
"It just is not a good idea." Swine flu parties are the latest version of chickenpox parties, where parents encourage their kids to share lollipops, spoons or whistles to spread the disease and get immunity.
VOA: standard.2009.12.18
They take it, the vaccine itself, the virus, reproduces in their gut and they can actually spread it to other children in the same way that they spread the disease where you've got children that are maybe at school or at childcare.
他们服用了疫苗,则疫苗菌本体,病毒本体便在他们的体内进行繁殖,实际它们以同样方法传播到其他孩子体内,当你去学校或者幼儿园,接你的孩子的时候,这些病毒正在传播
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