Some studies suggest that punishment can be too costly to be useful.

VOA: special.2009.03.03

But it's a valuable thing. It says, in each case, I return some useful value from this procedure.

但是这就是变量，是在每个例子中，我从这个程序中返回了一些有用的值。

麻省理工公开课 - 计算机科学及编程导论课程节选

Because I always think it's useful to watch some videos,

因为我一直认为，看一些视频会有用，

巴西的英语老师 - SpeakingMax英语口语达人

However,hoarders believe the objects could be useful some day.

VOA: special.2011.02.22

Now you have a gap in your data and yet you still have some magnetic particles there that could be useful.

现在的数据中可能会有一些空白,但你仍然有一些,有用的磁性粒子。

哈佛公开课 - 计算机科学课程节选

Some consider it an election ploy. But other surveys show the majority of French believe it is a useful conversation.

VOA: standard.2009.12.30

Now, it's also very useful to look at some of the relations that come out of these fundamental equations.

我们接下来可以考察,从这些基本方程中得出的一些方程。

麻省理工公开课 - 热力学与动力学课程节选

So, a natural product is something that is made by nature, and often natural products, whether it comes from a plant or a marine organism have some really good, useful properties. And so, one particular compound has anti-tumor properties. So, again, along this line of cancer research.

天然产物是在自然界中生成的,通常一个天然产物，不管是来自植物或者海洋生物,都有些非常好非常实用的性质，其中的一个特殊的化合物,可以治疗癌症,再一次我们又来到癌症研究上。

麻省理工公开课 - 化学原理课程节选

They are simply analytical tools. They're not inherently biased. They can be applied fairly to the text, and they're extraordinarily useful. It's just that some of the earlier practitioners of these methods did have ideological axes to grind, and we need to be aware of that.

所以它们只是分析工具，本身并不带有偏见,它们是十分有用的，完全可以运用于文本,但一些早期实施者并没有将其,融会贯通，我们必须意识到这一点。

耶鲁公开课 - 旧约导论课程节选

Much like the opportunities in the word "plastic," I think it's useful to suggest that this sense of gapping a spark plug may have some relevance to our understanding of what goes on in this reading process.

就像说到“塑料“时的几种可能性“,值得一说的是，这种火花塞间隙的概念,可能与我们的阅读有关,它让我们了解到阅读过程到底是怎样的。

耶鲁公开课 - 文学理论导论课程节选

But there's some things that that person can do and they're definitely useful in an organization and can do a lot of stuff.

这样的人才,知道该怎么做事,这公司来说十分重要，他们很能干。

斯坦福公开课 - 扎克伯格谈Facebook创业过程课程节选

Some may or may not be useful, but you just don't know.

有些可能有用,有些可能没用,但你们现在还不知道

耶鲁公开课 - 基础物理课程节选

Some words that are useful in this discussion, a 'host'. A host is the organism that you're interested in defending and it could be you or me or some typical person.

讨论中会用到一些词,宿主 宿主是,你对其免疫反应感兴趣的生物体,可以是你我,或者其他人

耶鲁公开课 - 生物医学工程探索课程节选

It turns out not, but it does evince the fact that we have some basic syntax like mathematics and equal signs and whatnot with which we can now start using for more useful purposes.

结果不是那样的，但这的确有个事实,我们有些基本的运算法则和等号和,其他一些东西，用来为我们一些,更多有用的目的而服务的。

哈佛公开课 - 计算机科学课程节选

Speed of response, right, so I actually do tend to respond to some people's emails more quickly than others and that in fact might be a useful indicator.

回复的速度，是的，我可能对某些人的邮件,回复的速度更快一些,而事实上它可能是个有益的暗示。

哈佛公开课 - 计算机科学课程节选

If you focus on some of the minutia of a site like this, you know, it's useful to be able to jump to a particular date whether in the future or in the past.

如果你关注像这样一个网站的一些细节，你会发现，若能跳转到,不论过去还是将来的一个特定日期，那将是很有用的。

哈佛公开课 - 计算机科学课程节选

You open what we call the "text editor," the specific one we used on Wednesday was called Nano, -- which is similar to Notepad or TextEdit -- totally simple, kind of dumbed down but in a useful way so that you can just focus on writing code and not learning some new interface.

你先打开那个“文本编辑器“,就是我们周三用过的叫做Nano的编辑器，这个跟写字板和记事本差不多-,非常简单的，只是通过一种有用的方法而进行精简了的,所以你们可以把注意力集中在编写代码上,而不需要学习一些新的界面操作。

哈佛公开课 - 计算机科学课程节选

So, in this class we'll be talking about energy a lot, and it's often useful to draw some sort of energy diagram to visualize the differences in energy that we're discussing.

所以，这堂课我们会讨论很多,关于能量的问题，讨论时，画能级图来使能量差别,形象化常常是很有用的。

麻省理工公开课 - 化学原理课程节选