lunar adj[课标新增词] 月球的；月亮的 （a lunar eclipse 月食）
A lunar eclipse occurs when the Sun, Earth, and Moon align (成一直线) so that the Moon passes into Earth’s shadow. In a total lunar eclipse, the entire Moon falls within the darkest part of Earth’s shadow, called the umbra (本影). When the Moon is within the umbra, it will turn a reddish hue (颜色). Lunar eclipses are sometimes called “Blood Moons” because of this phenomenon.
当太阳、地球和月球在一条直线上，使得月球运行进入地球的阴影时，月食就会发生。在月全食中，整个月球都落在地球阴影的最暗部分，称为本影。当月球在本影内时，它会变成红色。由于这种现象，月食有时被称为“血月”。
How can I observe the eclipse?
怎样才能观察月食？
You don’t need any special equipmentto observe a lunar eclipse, although binoculars (双筒望远镜) or a telescope will enhancethe view and the red color. A dark environment away from bright lights makes for the best viewing conditions.
你不需要任何特殊设备来观察月食，但使用双筒望远镜或望远镜既可以拓宽视野，也能使红色更显眼。远离明亮灯光的黑暗环境是最佳观看场所。
equipment n[学术词] 设备；器材 （equip + -ment）
enhance v[课标新增词] [学术词] 提高；增强
condition n[熟词生义] 环境；条件
Why does the Moon turn red during a lunar eclipse?
为什么月食时月亮会变红？
The same phenomenon that makes our sky blue and our sunsetsred causes the Moon to turn red during a lunar eclipse. It’s called Rayleigh scattering. Light travels in waves, and different colors of light have different physical properties. Blue light has a shorter wavelengthand is scattered (分散的) more easily by particles in Earth’s atmospherethan red light, which has a longer wavelength.
天空呈蓝色、晚霞呈红色等现象背后的原理也使得月球在月食期间变红。这叫作瑞利散射。光在波中传播，不同颜色的光具有不同的物理性质。蓝光的波长较短，比波长较长的红光更容易被地球大气层中的粒子散射。
sunset n [熟词生义] 晚霞 （sun + set）
Rayleigh scattering 瑞利散射 （一种光学现象，属于散射的一种情况，又称“分子散射”。）
property n [课标新增词] [熟词生义] 性质；特性
wavelength n波长（wave + length）
atmosphere n大气层；大气圈
Red light, on the other hand, travels more directly through the atmosphere. When the Sun is overhead, we see blue light throughoutthe sky. But when the Sun is setting, sunlight must pass through more atmosphere and travel farther before reaching our eyes. The blue light from the Sun scatters away, and longer-wavelength red, orange, and yellow light pass through.
另一方面，红光会更直接地穿过大气层。当太阳在头顶时，我们看到蓝光遍布天空。但当太阳落山时，太阳光必须穿过更多的大气层并传播更远，才能被我们看到。来自太阳的蓝光被散射出去，而波长较长的红色、橙色和黄色光穿透过来。
on the other hand 另一方面
overhead adv在头上方；在空中 （over + head）
throughout prep遍及；各处
During a lunar eclipse, the Moon turns red because the only sunlight reaching the Moon passes through Earth’s atmosphere. The more dust or clouds in Earth’s atmosphere during the eclipse, the redder the Moon will appear. It’s as if all the world’s sunrisesand sunsets are projectedonto the Moon.
在月食期间，月球会变红，是因为到达月球的唯一阳光穿过了地球大气层。月食期间，地球大气层中的尘埃或云层越多，月亮就越红。就好像世界上所有的朝霞和晚霞都投射到了月球上。
sunrise n [熟词生义] 朝霞
project v [学术词] [熟词生义] 投射
检测练习
一、写出下列划横线单词的近义词
1. The last total lunar eclipse for three years will occuron November 8, 2022.
2. Totality ―the stageof the eclipse where the Moon is entirelyin Earth’s shadow ―will be visible across North and Central America and in Ecuador, Colombia, and western portions of Venezuela and Peru.
3. What if it’s cloudy or I’m not in the viewing region?
4. Light travels in waves, and different colors of light have different physical properties.
二、语法填空
There are three types of lunar eclipses. The first is a total lunar eclipse, when the sun, moon, and earth are in perfect alignment (排成直线) and the moon falls within the earth’s umbral (本影的) shadow.返回搜狐，查看更多