It is an electron beam. In the 1890s, the latter part of the 19th century a very fashionable word was "ray."

那是个电子束，在十九世纪九十年代，就是19世纪末,一个很时髦的词汇-“光线“

麻省理工公开课 - 固态化学导论课程节选

There was... a few years there, I think, in the early nineties,

我想在几年前，也就是九十年代初，

对纽约的印象 - SpeakingMax英语口语达人

I've been here in MIT for thirty years, and in the early nineties I taught the large freshmen physics course, and electromagnetism.

我麻省理工工作三十年了，在上世纪九十年代初,我就开始给大一新生上物理课，以及电磁学。

麻省理工公开课 - 媒体、教育、市场课程节选

First is that, during the '90s, I think the Chinese IT market was very, very small.

第一，在九十年代，中国的互联网市场规模很小。

斯坦福公开课 - 百度CEO李彦宏演讲：全球最大搜索引擎的发展课程节选

It's quite spectacular because here in the 1890s we have the apex of the Western classical orchestra, this big, beautiful, powerful instrument.

它之所以雄壮因为在十九世纪九十年代,西方古典管风琴正处于顶峰,这是一种巨大,美丽,有力量的乐器

耶鲁公开课 - 聆听音乐课程节选

It happened in the late 1990s, in the United States, that patent offices started to accept financial patents.

美国是在上世纪九十年代末期的时候，专利局才开始授予金融专利。

耶鲁公开课 - 金融市场课程节选

But what you've got at the top are the early 1790s and I think 1820 in terms of slave population in the American south.

一般,你们会认为南方的奴隶数量,达到高峰是在十八世纪九十年代,而我却认为1820年更准确

耶鲁公开课 - 美国内战与重建课程节选

And where we where at the start of the 20th Century in the late 1890's is that we were at a place where there was great confidence in our understanding of the universe, and our understanding of how all matter worked.

0世纪开始讲起,在19世纪的九十年代,人们对于自己,对自然的理解,对自然所有物质,如何工作的理解十分自信。

麻省理工公开课 - 化学原理课程节选

I had an opportunity in the late 80s and early 90s, working with a small foundation in New York, to begin cultural activities in Vietnam before normalization of relations between the US and Vietnam.

我在八十年代末九十年代初曾经有幸，在纽约的一个小型基金会工作，和越南开展一些文化活动,那时美国和越南还未实现外交关系正常化。

普林斯顿公开课 - 人性课程节选

We had a bubble in the stock market in the '90s and it collapsed after 2000 and with that it brought the economy down.

我们在九十年代股票市场中有泡沫,并且它在2000年崩塌了0,这使得经济一度低迷。

耶鲁公开课 - 金融市场课程节选

Particularly the course I taught in the early nineties have 600 students there.

尤其是我在九十年代讲的物理课,有600多个学生。

麻省理工公开课 - 媒体、教育、市场课程节选

We've seen the price of oil, lately, move all over the map. It went up to $100 recently and it was just as late as late 1990s that it was under $20 and people just don't know where it's going to go.

我们都能看到现在石油的价格，一路飙升，最近达到每桶一百美元,而在上世纪九十年代末,每桶石油还不到二十美元0,人们根本无法预想石油价格,还会飙升到什么地步。

耶鲁公开课 - 金融市场课程节选

Also, the filing cabinet-- that sounds like a minor thing-- was invented in the 1890s.

还有档案橱柜-,听起来很微不足道-,是在19世纪九十年代发明的。

耶鲁公开课 - 金融市场课程节选