Okay. So you have this concentrated light source.

好的。所以你有这中的源。

Having a convenient light source changed people's lives.

便捷的源改变了人们的生活。

Many light sources around us reveal secrets through the spectroscope.

我们周围的许多源通过分镜揭示秘密。

You have one shadow because our primary light source on Earth is our sun.

你只有一影子，是因为地球上主要的源是太阳。

Just think how much we rely on man-made light sources in our lives.

想想我们在生活中对人造源的依赖程度。

Because not a single light source had formed yet.

因为此时的宇宙还没有形成单源。

Other elements, like sight lines, mirrors, and light sources describe the moment through space and position.

其他元素如视线、镜子和源描述了当下的空间和位置。

Rockefeller knows if he can frighten the public, kerosene will continue to be the dominant light source.

洛克菲勒知道 只要他能吓坏公众 煤油就能继续保持源上的统治地位。

With a convenient light source, people were able to work longer which led to even more technological innovation.

有了方便的源，人们就能够工作更久，从而带来了更多的技术革新。

The astute among you might point out that it also matters a lot where the light source is.

你们当中的精明人士可能会 ，源的位置也很重要。

Martin Jotov says the result is a light source that can be produced in mass quantities on a sheet of plastic.

马丁·乔托夫说，这带来的结果是人们可以在一片塑料上制造大量源。

The train car turned pitch black as it barreled through a tunnel. Ember was the only light source in the train.

列车开进隧道，车厢里漆黑一片，小焰成了唯一的源。

Its angle means that it will reflect light from the light source towards our view.

它的角度意味着它会将来自源的反射到我们的视野中。

Torches are just one of several light sources Stone Age artists used to navigate caves.

火把只是石器时代艺术家用来在洞穴中航行的几种源之一。

This tilting action would make sense if the strongest light source was in the sky.

如果最强的源在天空中，这种倾斜动作是有意义的。

I always start off by thinking, where is the light source, where is it coming from.

我总是从思考开始， 源在哪里， 它来自哪里。

Which is replacing Thomas Edison's incandescent bulb as the the light source of the 21st century.

它正在取代托马斯爱迪生的白炽灯泡成为 21 世纪的源。

After all,   for a closer light source it simply wouldn't be true.

毕竟，对于更近的源来说，这是不正确的。

The astute among you might point out that it  also matters a lot where the light source is.

精明的人可能会源在哪里也很重要。

Whether or not the light source is moving.

源是否在移动。