And it's a good thing, because officials closed some of the fishing grounds.

VOA: standard.2010.05.27

Now you can actually go, now that I realize that Libya is now open; it's no longer a closed territory.

现在你确实可以去那个地方,据我所知,现在利比亚已经对外开放,不再是一个封闭国家

耶鲁公开课 - 古希腊历史简介课程节选

It's insulated. It's a closed system. In fact, it's an isolated system. There's no energy or matter that can go through that boundary.

系统指的，是盒子里的东西,它是封闭孤立的。

麻省理工公开课 - 热力学与动力学课程节选

My friends in Britain, and of courese, Britain is our oldest, one of, it's not our oldest ally but it's certainly one of our closed allies.

我在英国的朋友，当然，英国是我们最早，不，它不是我们最早的同盟国,但它是我们最紧密的同盟。

普林斯顿公开课 - 国际座谈会课程节选

Let's see if it recognizes, try voting--polling closed--not so good.

我们试试它能不能识别,投票,结束,不太好

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

A state where it's closed, so imagine a channel with a lid on top of it; when it's closed nothing can go through the channel, when it's open then things can go through.

一种是闭合状态,想想一个有盖子的通道吧,当盖子合上的时候任何东西都不能通过,而打开时就畅通无阻

耶鲁公开课 - 生物医学工程探索课程节选

So, for example, if we look at sodium channels, and sodium channels are some of the particularly prevalent ones when we're talking about neurons, if you think about the cell membrane, and this little green cartoon is me trying to show a sodium channel here, and in this case, you can see that it's closed, such that no ions are getting through.

比如，让我们来看一下钠离子通道，钠离子通道是我们会经常遇到的几个之一,在讨论神经元的时候，如果大家想想细胞膜，而这个绿色的小示意图就是我用来表示,钠离子通道的，在这种情况下，大家可以看到它是关闭的，因此没有离子可以通过。

麻省理工公开课 - 化学原理课程节选

It's a closed system, so the number moles doesn't change.

这是一个封闭系统，因此摩尔量不会改变。

麻省理工公开课 - 热力学与动力学课程节选

It's - a suture or a stitch has to hold the wound closed so it has to have certain mechanical strength and imagine the problem of making something that's dissolvable so it disappears but also is strong enough to hold a wound closed reliably for a length of time.

能够拉紧切口的缝合线,就必须具有一定的机械张力,大家想像一下制造这种缝合线的难度,身体组织不仅要能吸收这种缝合线,而且这种线必须有足够的张力,一定时间内能够拉紧切口

耶鲁公开课 - 生物医学工程探索课程节选