It might not have any electrons in it, but it still exists, so you need to draw these into your molecular orbital diagram.

也许它里面没有电子，但它是存在的，所以你需要在分子轨道图里画出来。

麻省理工公开课 - 化学原理课程节选

if you want to see some more, if you want to travel, so you need it absolutely.

如果你想见识更多，如果你想旅行的话，你绝对需要英语。

学习英语的理由 - SpeakingMax英语口语达人

You could look at what it does but babies are not very coordinated or skilled so you need to use clever methods.

你可以观察婴儿,但婴儿不怎么配合,或者说他们的言语技能并不熟练,所以你必须要用精巧的方法才能做到

耶鲁公开课 - 心理学导论课程节选

So, you want to give it to them because the biology of children is different than adults, and so you need to make sure it works in that population.

你希望将疫苗分发给孩子们,因为儿童与成人在生物学上不尽相同,要确保疫苗对儿童有效

耶鲁公开课 - 生物医学工程探索课程节选

And so we need to have this mix of sort of-thank you da-da-da-da-boom. Anyway, moving right along.

所以我们需要把各种动力,混合在一起，不管怎样，始终往前发展。

斯坦福公开课 - 微软CEO-Steve.Ballmer谈科技的未来课程节选

So any time in a molecular orbital diagram you draw in orbitals, you need to draw the corresponding molecular orbitals.

任何时候你在分子轨道图里画轨道，你都要画出相对应的分子轨道。

麻省理工公开课 - 化学原理课程节选

So, when in doubt, if you're having some weird character issue, odds are you need to escape it in some way.

如果你有拿不准的字符,可能就要用到转义字符了。

哈佛公开课 - 计算机科学课程节选

Wait. Don't you first need to study the other ?" so that you can be more sensitive to others?"

等等，你难道不要首先研究别人,才能对别人更敏感吗“

哈佛公开课 - 幸福课课程节选

So we need to revise our account of what it is on the physicalist picture to say that you're dead.

我们应该重新修改一下,物理主义学上对死亡的定义。

耶鲁公开课 - 死亡课程节选

I know it's boring, but we need to do it so you know what the ground rules are.

我知道这很无聊，不过为了让你们了解规则,我们必须得做这个。

麻省理工公开课 - 计算机科学及编程导论课程节选

And you, you need not to be so ethically imperialist that you can't work with us to open up again the canon if you will of rights in the way we talk about it and to incorporate our perspectives."

而你们呢，你们需要摒弃,那种道德帝国主义态度，也就是,你们不愿跟我们合作,不愿敞开心扉,用我们的方式去理解人权,从我们的角度去看这个问题“

普林斯顿公开课 - 人性课程节选

Fifty-two of you so far, so what we need are more people to get clickers, because some of these polls will be interesting to do.

目前为止有五十二个人,我需要更多的人能有个表决器,因为这样的投票会很有意思

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

So that's another aspects , something you need to mention to the Afghan problem.

这是事情的另外一面，谈到阿富汗问题是你不得不提的一个方面。

普林斯顿公开课 - 国际座谈会课程节选

So you need the mathematics to imitate reality.

你需要数学来模拟显示。

麻省理工公开课 - 固态化学导论课程节选

They can reproduce and so you only need to give a few of them in order to make many, many inside the body.

它们能自我复制,所以只需少量病毒,就能在体内产生大量的病毒

耶鲁公开课 - 生物医学工程探索课程节选

What this means is that if you miss a class you need to get notes, and so you should get them from a friend or from the person sitting next to you.

这也就意味着,如果你落下了一节课,你就要看笔记,你可以向朋友或者身边的同学借来看

耶鲁公开课 - 心理学导论课程节选

It gets really kind of trippy if you wanna output a backslash, \ you can't just use the backslash, \\ you need to use backslash backslash because otherwise a single backslash is confused with the so called escape character.

如果你想输出一个反斜杠，估计又得迷糊了，实际上，你不能直接用，而是要,否则一个\可能会被误认为,是转义字符。

哈佛公开课 - 计算机科学课程节选

And we haven't talked about reactions at all yet, so you don't need to worry about the specifics of that exactly, but just that if you have this negative change in energy, you have a more stable product than you do reactant.

当然我们还没有开始讨论反应，所以你不用担心它的细节是怎么样的，你只需要知道，如果能量的变化是负值，那么你将得到一个比反应物更稳定的生成物。

麻省理工公开课 - 化学原理课程节选

PROFESSOR: -- that this is not a quick clicker question, so you actually need to maybe write something down to figure out the answer.

教授：这个问题不是一眼就能看出来的，你们需要在纸上写一写,才能得到答案。

麻省理工公开课 - 化学原理课程节选

So if you want to do well in 1504-- you'll know what you need to do, right?

如果各位想学好1504这门课-,你们知道该怎么做了，是吗？

哈佛公开课 - 幸福课课程节选

So this is going to tell you pretty much everything you need to know in terms of getting ready for the exam, which is next Wednesday.

这上面包括了几乎,所有的你需要知道的,关于如何准备这次考试的信息，考试时间是下周三。

麻省理工公开课 - 化学原理课程节选

So the first thing I need to tell you is I really mean it.

所以第一件事我要告诉你们是我是认真的。

耶鲁公开课 - 死亡课程节选

So these are five things you need to know to be happy.

比如，快乐的五个关键。

哈佛公开课 - 幸福课课程节选