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

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

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

As I said, in some context last time, how many Russian peasants died in the 1890s thinking, "Oh my god, if the Czar only knew that we're starving, how angry he would be with his officials."

就像我在上一讲提到的,有多少死于1890年代的俄国农民会想,"上帝啊,要是沙皇知道我们在挨饿就好了,他该对手下的官员发多大的火啊"

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