与美国小学生一起学英文第10册 第10期:棱镜
时间：2019-01-10 作者：英语课 分类：与美国小学生一起学英文第10册
英语课
Prisms 棱镜
Why can we see rainbows after rain? 我们雨后为什么能看到彩虹？
We can see rainbows after rain because droplets 1 of moisture in the air work like a big prism. 这是因为空气中的水滴就像一个大棱镜。
So what is a prism? 那么什么是棱镜呢？
It is a piece of glass. It usually has a triangular 2 shape. 它是一块玻璃，通常有三角。
What does the prism do? 棱镜的作用是什么？
It reflects and separates light. 它能反射和分散光线。
When we look at sunlight, it seems white. 我们看阳光时，它似乎是白色的。
However, if you see sunlight through a prism, 但如果你透过棱镜看到阳光的话，
you'll know that there are different colours from red to violet in the white light, just like a rainbow. 你就会知道，白光中有不同的颜色，从红到紫，就像彩虹一样。
Because of prisms, we know that sunlight is a mixture of different colours. 因为棱镜，我们知道太阳光是不同颜色的混合物。
n.小滴( droplet的名词复数 )
- Droplets of sweat were welling up on his forehead. 他额头上冒出了滴滴汗珠。 来自辞典例句
- In constrast, exhaled smoke contains relatively large water droplets and appears white. 相反，从人嘴里呼出的烟则包含相当大的水滴，所以呈白色。 来自辞典例句
adj.三角（形）的，三者间的
- It's more or less triangular plot of land.这块地略成三角形。
- One particular triangular relationship became the model of Simone's first novel.一段特殊的三角关系成了西蒙娜第一本小说的原型。
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