Dr.Lepora says she will probably return to MSF, because she says once she learned how to be effective in a crisis situation, she finds it very difficult not to act when another crisis comes up.

VOA: standard.2010.06.29

If you or I buy it, it costs $51 per dose, you need three doses to be effective.

如果你或者我购买它,每支将花费五十一美元,你需要购买三支才会起效

耶鲁公开课 - 生物医学工程探索课程节选

We want to share things, but we want to get more scientific about how we share things and that means-- and we want to be effective.

我们才想要分摊风险，但我们得用更科学的方式,也可说是更有效率的方式-,来分摊风险。

耶鲁公开课 - 金融市场课程节选

Carol Pandak says tests found the new vaccine to be thirty percent more effective than the trivalent vaccine.

VOA: special.2010.01.18

And if we experimentally know z what the ionization energy is, we actually have a way to find out what the z effective will be equal to.

我们实际上就有了一个办法,去找出有效的，等于多少,我们可以使用这里的方程。

麻省理工公开课 - 化学原理课程节选

But recent findings suggested that tPA may be effective in saving brain tissue even if three to four and a half hours have passed.

VOA: special.2009.09.22

Again, your common sense tells you, "Look, you are pulling something whose effective mass seems to be 5, the answer is 2."

你的常识会又一次告诉你,"你在拉一个相当于 5 千克的物体,所以加速度是 2 "

耶鲁公开课 - 基础物理课程节选

But recent findings have suggested that tPA may be effective in saving brain tissue even if three to four and a half hours have passed.

VOA: special.2009.08.12

This cell can only be an effective barrier if there's no way to get past it.

这些细胞只有密不透风,才足以形成一道屏障

耶鲁公开课 - 生物医学工程探索课程节选

Farmers may think trees will take too long to grow and be effective.

VOA: special.2009.09.08

Well, the reason, the way that we can check it is just to see if it's in between our two extreme 1 cases. We know that it has to be more than 1, because even if we had total shielding, 1 we would at least feel is the effective of 1.

好的我们可以检查它的原因和方式是观察,它是否在我们的两种极端案例之间,我们知道它必须大于，因为即使如果我们有完全的屏蔽，我们最小感到的有效值是。

麻省理工公开课 - 化学原理课程节选

"And a lot of these bullying prevention and intervention programs that focus on bystanders have been shown to be the effective programs because they focus on changing that bystander behavior.

VOA: special.2010.05.06

So our minimum that we're going to see is that the smallest we can have for a z effective 1 is going to be equal to 1.

所以我们能够看到的,最小的有效电荷量,等于。

麻省理工公开课 - 化学原理课程节选

"This is an evaluation instrument that is finally able to capture who is highly effective and who is ineffective and who could be doing better and could use some assistance.

VOA: special.2011.08.11

So we should be able to calculate a z effective for any atom that we want to talk about, as long as we know what that ionization energy is.

我们应该可以计算出任何一个,我们想要谈论的原子的有效电荷量，只要我们知道电离能是多少。

麻省理工公开课 - 化学原理课程节选

And should that baby be born preterm, we should care for that baby by providing a package of interventions that have been shown to be tried and true and very effective."

VOA: special.2009.10.26

How do you want to aim it so you can be most effective?

你怎样瞄准才能使攻击最有效

耶鲁公开课 - 基础物理课程节选

"If we are asked to bear the burden, we should also be given the chance to engage effective dialogue with Iran.

VOA: standard.2010.07.26

Well, the vaccine turned out to be about 70% effective.

疫苗的有效率为百分之七十左右

耶鲁公开课 - 生物医学工程探索课程节选

Once that's established,however, she believes it should be cost effective to provide rehabilitation services via remote audio and video links.

VOA: standard.2010.06.14

But what you should be able to do is take a look at a list of answers for what we're saying z effective might be, and determining which ones are possible versus which ones are not possible.

但是你们应该能够做到的,是看一下这个可能的,有效电荷量的答案列表，并且确定哪些是可能的,哪些是不可能的。

麻省理工公开课 - 化学原理课程节选

French says that, in addition to identifying how tele-rehabilitation could be effective, the experiment revealed limitations in the use of technology.

VOA: standard.2010.06.14

Not only are we taking away an electron here, but we're also going to decrease shielding, so the electrons that are already in there are going to feel a higher z effective and will be pulling and the atom will be getting smaller.

这不只是因为我们拿走了一个电子，还因为我们这样做会减小屏蔽效应，这样留下的电子,将会感受到更大的有效核电量,也就会感受到更强的吸引力，使得原子变得更小。

麻省理工公开课 - 化学原理课程节选

Economists have long considered government spending, especially on infrastructure, to be an effective tool for revitalizing a stagnating economy.

VOA: standard.2009.10.16

z So in our first case, our first extreme case, would be that the z effective that is felt by electron number 1, is going to be plus 1.

被1号电子感知到的有效的，是+1所以,我们所能做的是计算出，我们从这个。

麻省理工公开课 - 化学原理课程节选

"While they may not respond to antidepressants, the good news is that there are other,effective treatments that can be employed to help,".

VOA: standard.2010.01.08

Now, the polio vaccine that Salk produced was very effective, but it required a fairly large dose of the vaccine and it had to be injected into the arms of children.

索尔克生产的小儿麻痹症疫苗效果显著,但是,该疫苗的单支注射剂量非常大,而且必须通过小孩的手臂进行注射

耶鲁公开课 - 生物医学工程探索课程节选

The California Democrat wants the federal agencies involved in off-shore drilling to be more effective.

VOA: standard.2010.05.18

And that's going to be equal to negative z effective squared times r h over n squared.

有效的z的平方,乘以RH除以n的平方。

麻省理工公开课 - 化学原理课程节选

And what we're actually talking about again is the zeffective. So that z effective felt by the 2 p is going to be less than the z effective felt by the 2 s.

我们实际上所谈论的,所以被2p感觉到的,的有效电荷量,有效电荷量小于2s感觉到。

麻省理工公开课 - 化学原理课程节选