That is metallic sodium that would keep in kerosene so it doesn't react with the oxygen in the air.

金属钠应该保存在没有中,这样它就不会和空气中的氧气反应了。

麻省理工公开课 - 固态化学导论课程节选

So just keep in mind, like we're talking about with the student, you can't be afraid of making mistakes

所以记住，就像我们对学生说的，你不能害怕犯错误，

生存英语 - SpeakingMax英语口语达人

So it's going to keep in mind the limitations, so let's start off with talking about ionization energy.

那么让我们将这些局限性记在心里，继续来讨论一下电离能。

麻省理工公开课 - 化学原理课程节选

Keep them up. Wave them in the air with a bit of motion.

先别放下手,再举一小会

耶鲁公开课 - 博弈论课程节选

By determining how many of those molecules to hold onto, how many to keep in the body, how many to release determines the internal composition with regard to that ion.

通过控制体内这些分子的水平,即体内保有多少,又排出多少,就能够保证内环境中离子组成的稳定

耶鲁公开课 - 生物医学工程探索课程节选

Well, you can use what's called an array which is kind of a list or a little satchel of that you might physically carry that you can put things in again and again, and with an array can you actually keep track of not just numbers but any kinds of things, other sprites or other pictures, or perhaps a little something like this.

你可以使用数组,它其实是个列表,或者说是个小包,你可以把东西一个个放到里面，通过数组你可以保存任何种类的变量,图片或者像，这个例子中的一些小变量，而不仅仅是数字。

哈佛公开课 - 计算机科学课程节选

because it’s such a convenient, such an easy way to keep in touch with everybody.

因为这个真的可以很方便地跟大家保持联系。

便利的社交媒体 - SpeakingMax英语口语达人

I still keep in touch to, keep in touch with until today.

我们还有保持联系，到现在还联系。

我尊敬的教授 - SpeakingMax英语口语达人

and it's a really convenient way to keep in touch with them.

这样联系他们真的很方便。

用社交网站找到的人 - SpeakingMax英语口语达人

How do you keep in touch with your friends?

你怎么和你的这些朋友保持联系呢？

一起长大的朋友 - SpeakingMax英语口语达人

Notice the freedom that he exercises in unfolding what feels like an improvisatory monologue in which he makes you race to keep up with him as he follows a semi-hidden logic that he treats as self-evident.

注意他随意地展开,一段即席的独白,让所有人都跟随他的脚步,而他跟随着自己若隐若现的但自认为显而易见的逻辑。

耶鲁公开课 - 现代诗歌课程节选

All right, so before I begin I just want to say I want to keep this pretty informal so feel free to jump in if you have comments, questions if you disagree with me.

在我开始之前,我想说,不需要那么正式,如果大家有什么见解或者问,如果大家有什么不同意见,希望大家有一些不同的见解。

麻省理工公开课 - 电影哲学课程节选

I think it's in part that, suffering from lupus, she was very much confined to her house in Georgia, and the letter writing, this kind of correspondence, was certainly a way for her to keep in contact with the world of readers and other writers and friends.

我想这多少与她，受病痛的折磨有关，受制于病情，她只能呆在,乔治亚州的家里，足不出户，所以写信，必然是她和读者、,其他作家和朋友联系的方式。

耶鲁公开课 - 1945年后的美国小说课程节选

The presence of both Mars and Venus suggests you want to box everything into a neat, ordered, structured way but keeping a piece of jade or carnelian close will help you keep in touch with your fun side."

火星和金星的同时出现表明,你想把东西整洁有序地打包好,随身携带一块翡翠或玛瑙,会使你获得愉悦的心情“

耶鲁公开课 - 心理学导论课程节选

So, we keep the atoms with the lowest ionization energy in the center.

因此，我们把电离能,最低的原子放在中间。

麻省理工公开课 - 化学原理课程节选

So that doesn't make a difference for us when we're talking about neutral atoms, 4s because we would fill up the 4 s first, because that's lower in energy until we fill it, and then we just keep going with the d orbitals.

所以那对我们来说没什么不同,所以当我们讨论中性原子时，因为我们会首先填充，因为在我们填充它之前它的能量都较低，然后我们继续填充d轨道。

麻省理工公开课 - 化学原理课程节选

And the reason I was able to do that and keep with what my original intentions were was to have a career that was the fulfilling, in terms of helping people and being engaged in science, is all of a sudden I realized, as chemists, we can think about better ways to build molecules that are important for making medications.

我能够这么做,并且能不和我原来的打算冲突,是因为我的职业很有意义，能帮助他人，又和科学相关,于是突然我意思到，作为一个化学家,我们可以思考出更好的办法,制造出在制药方面十分有用的分子。

麻省理工公开课 - 化学原理课程节选

With Facebook, I tend to use it to keep in contact with old friends

我用Facebook和老朋友保持联系，

用社交网站找到的人 - SpeakingMax英语口语达人