Okay. So you have this concentrated light source.

好的。所以你有这个集中的光源。

Having a convenient light source changed people's lives.

便捷的光源改变了人们的。

Many light sources around us reveal secrets through the spectroscope.

我们周围的许多光源通过分光镜揭示秘密。

Because not a single light source had formed yet.

因为此时的宇宙还没有形成单个光源。

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

想想我们中对人造光源的依赖程度。

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

你只有一个影子，是因为地球上主的光源是太阳。

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

其元素如视线、镜子和光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 只吓坏公众 煤油就继续保持光源上的统治地位。

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

有了方便的光源，人们就够工作更久，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会指出 ，光源的位置也很重。

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光源的光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洞穴中航行的几种光源之一。

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一片塑料上制造大量光源。

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，小焰成了唯一的光源。

Whether or not the light source is moving.

光源是否移动。

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

如果最强的光源天空中，这种倾斜动作是有意义的。

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

毕竟，对于更近的光源来说，这是不正确的。

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

我总是从思考开始， 光源哪里， 它来自哪里。

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

它正取代托马斯爱迪的白炽灯泡成为 21 世纪的光源。

Third, many plants live in environments where their leaves are not exposed to nighttime light sources.

第三，许多植物叶子不暴露夜间光源的环境中。