有声英文阅读-月球

The Moon
月球

     We find that the moon is about 239,000 miles (384,551 km) away from the earth, and, to within a few thousand miles, its distance always remains¹ the same. Yet a very little observation shows that the moon is not standing² till. Its distance from the earth remains the same, but its direction continually³ changes. We find that it is traveling in a circle - or very nearly a circle - round the earth, going completely round once a month, or, more exactly, once very 27 1/3 days. It is our nearest neighbour in space, and like ourselves it is kept tied to the earth by the earth's gravitational pull.
     Except for the sun, the moon looks the biggest object in the sky. Actually it is one of the smallest, and only looks big because it is so near to us. Its diameter⁴ is only 2,160 miles (3,389 km), or a little more than a quarter of the diameter of the earth.
     Once a month, or, more exactly, once every 29 1/2 days, at the time we call "full moon," its whole disc⁵ looks bright. At other times only part of it appears bright, and we always find that this is the part which faces towards the sun, while the part facing away from the sun appears dark. Artists could make their pictures better if they kept this in mind - only those parts of the moon which are lighted up by the sun are bright. This shows that the moon gives no light of its own. It merely reflects the light of the sun, like a huge mirror hung in the sky.
     Yet the dark part of the moon's surface is not absolutely black; generally it is just light enough for us to be able to see its outline, so that we speak of seeing "the old moon in the new moon's arms." The light by which we see the old moon does not come from the sun, but from the earth. We know well how the surface of the sea or of snow, or even of a wet road, may reflect uncomfortable much of the sun's light on to our faces. In the same way the surface of the whole earth reflects enough of the sun's light on to the face of the moon for us to be able to see the parts of it which would otherwise be dark.
     If there were any inhabitants⁶ of the moon, they would see our earth reflecting the light of the sun, again like a huge mirror hung in the sky. They would speak of earthlight just as we speak of moon-light. "the old moon in the new moon's arms" is nothing but that part of the moon's surface on which it is night, lighted up by earth light. In the same way , the lunar inhabitants would occasionally⁷ see part of our earth in full sunlight, and the rest lighted only by moon-light; they might call this "the old earth in the new earth's arms."
     
     我们发现月球距离地球约23万9千英里（38万4千551公里）。月球与地球总保持这个距离，变化不超过两三千英里。虽然它离地球的距离仍然是那么远，但是它运转的方向却不断地在变。我们发现月球环绕地球的轨道总是圆周形--或很近似圆周形。每一个月，或者更确切些说是每27又1/3天就环绕地球转一圈。在太空中月球是我们最近的邻居。正像我们本身摆脱不了地心吸引力一样，月球也摆脱不了地球的吸引力。
     除了太阳而外，月球好像天空中最大的天体了。可是实际上它却是最小的天体之一。只是因为它距离我们太近了，所以看起来才显得大。月球的直径只有2160英里（3389公里）仅仅比地球直径的1/4稍多一点。
     每一个月或者更精确些说每29又1/2天有一次有个我们称之为"望月"的时候。这个时候整个月亮的园盘看起来很明亮。在其他一些时候，月亮的园盘只有一部分看起来觉得亮。我们总是发现这亮的部分是面向着太阳的、面背着太阳的那一部分看起来就黑暗。如果画家们能记住这一点，即只有被太阳照射得发高的那部分月球是明亮的，那他们作起画来就会画得更好。这就表明了月球本身是下发光的。月球就像悬在画龙点睛的一面巨型的大镜子一样，它只能反射出太阳光。
     但是月球表面上黑暗的部分并不上绝对黑的。一般地这一部分也能有足够的光让我们能勉强刚刚能看清月球的轮廓，这就是我们所说的"新月抱着旧月"的现象。我们用来看到旧月轮廓的光并汪是来自太阳，而是来看地球。我们都清楚地知道，海水的表面、雪地的表面，甚至下雨天的路面都会把很强的太阳光反射到我们的脸上，照得我们很不舒服。同样道理，整个地球的表面也足可以让我们看清月球的轮廓，如果没有地球的反射光，那月球的这一部分将会是黑暗的。
     假定月球上也有居民，他们就会看到，地球也像一面高悬在天空中的巨型的镜子一样，反射太阳光到月球上。"月球居民们"也会谈到地球光，正像我们地球人谈到月亮光一样。"新月抱旧月"只不过就是月球表面上正处于黑夜的那一部分被地球的反射光反照的结果。同理，月球上的居民偶尔也会看到我们地球一部分完全处在阳光的照射下，而地球的其余的部分只能照到月光；月球的居民们或许也会把这种现象称作"新地球抱着旧地球"吧。

1 remains   

n.剩余物，残留物；遗体，遗迹

参考例句：

• He ate the remains of food hungrily.他狼吞虎咽地吃剩余的食物。
• The remains of the meal were fed to the dog.残羹剩饭喂狗了。

2 standing   

n.持续，地位；adj.永久的，不动的，直立的，不流动的

参考例句：

• After the earthquake only a few houses were left standing.地震过后只有几幢房屋还立着。
• They're standing out against any change in the law.他们坚决反对对法律做任何修改。

3 continually   

adv.不间断地，不停地；多次重复地

参考例句：

• The other kids continually taunted him about his size.其他孩子不断地耻笑他的个头儿。
• The US is continually building up its armed forces.美军正持续加强它的三军。

4 diameter   

n.直径

参考例句：

• The circle has a diameter of 6 inches.这个圆直径六英寸。
• A diameter passes through the center of a circle.直径从圆心穿过。

5 disc   

n.圆盘；唱片，磁盘；adj.圆盘形

参考例句：

• He hands a metal disc to me.他把一个金属圆盘给我。
• The disc went spinning away into the sky.圆盘旋转着飞入空中。

6 inhabitants   

n.居民，住户， （栖息在某地区的）动物( inhabitant的名词复数 )

参考例句：

• They set fire to the city and massacred all the inhabitants. 他们放火烧了这座城市，而且屠杀了所有的居民。 来自《简明英汉词典》
• He quartered his men on the inhabitants in the town. 他把他的部队安置在镇上的居民家中。 来自《简明英汉词典》

7 occasionally   

adv.偶然地；非经常地

参考例句：

• He went on talking,occasionally wiping at his face with a towel.他继续说着，偶尔用毛巾擦一下脸。
• I like playing football best,but occasionally I play table tennis,too.我最喜欢踢足球，偶尔也打打乒乓球。