It is a glass tube. He wants to narrow the light so he puts a couple of slits here.

这是根玻璃管子，他想要减少光的发散,所以在这里开了几个口子。

麻省理工公开课 - 固态化学导论课程节选

And as you know, since several wars with India, it's a very long, narrow country on the 85 miled wide.

这是一个非常狭长的国家，在与印度的几场战争后。

普林斯顿公开课 - 国际座谈会课程节选

But it's not a very good thing if my consciousness continues to narrow and constrict beyond the threat, or beyond the hardship.

但它变得不是很好,如果我的意识继续狭窄,收紧超出威胁，超出困难。

哈佛公开课 - 幸福课课程节选

And then he just takes that narrow column of light and he admits it to a prism. And what the prism does is takes a tiny, tiny difference in wavelength and refracts it through a different angle.

他只取了那个窄光柱,然后把它对准一个棱镜，棱镜所做的就是,测量出波长的细微差别,然后从不同的角度测定它的折射度。

麻省理工公开课 - 固态化学导论课程节选

So we could ask, in this narrow sense, what properties do languages have and then go on to ask, in a broader sense, what other communicative systems also possess those properties.

我们可以发问,从狭义上说,语言拥有何种特性,然后我们可以接着发问,从广义上说,哪些其他的交流系统也同样拥有那些特性

耶鲁公开课 - 心理学导论课程节选

These are linguistic terms. But of course, the people who spoke them, especially in the early years, tended to be part of a relatively narrow collection of people, who intermarried with each other chiefly, and therefore developed common cultural characteristics.

这时的希腊语主要是一些语意项,不过当然,那些讲希腊语的人,特别是在早期,是一个相对小范围的人群,他们主要在族群内部通婚,由此,发展出相近的文化特征

耶鲁公开课 - 古希腊历史简介课程节选

And what we know is that very often we enter a downward spiral, a vicious cycle when we go into this narrow and constrict mode.

我们知道经常会进入下行螺旋，一个恶性循环，当我们进入狭窄收紧的模式。

哈佛公开课 - 幸福课课程节选

And what will happen is as a result, I experience sadness, because that is what I am thinking about, and sadness-- a painful emotion, not a positive emotion-- leads to further narrow and constrict.

结果就是，我感觉悲伤，因为我一心只想那个，悲伤-,是一种痛苦的情绪，一种消极情绪-,导致进一步的收窄缩紧。

哈佛公开课 - 幸福课课程节选