时差N小时 如何制作陨石坑?(上)

What makes science really fun is when you get to do things yourself, so today we’re going to be making moon craters¹.

科学真正有趣的时刻是当你亲身实践的时候，今天咱们来一起制作月球陨石坑吧！

They’re the roundish blast-marks left on the moon’s surface by ancient meteorites².

陨石坑是古代陨石撞击月球表面后留下圆形痕迹。

The moon’s surface is covered with literally³ billions of impact craters, and some of them are bigger than a fair-sized city on earth.

月球表面有数十亿的陨石坑，有的陨石坑甚至比地球上某个大城市还要大。

You can see the bigger ones just with the naked eye, and with a pair of binoculars⁴ you can make out many more.

通过肉眼，你只能看到月球表面较大的陨石坑，如果使用望远镜的话就能看到更多陨石坑。

So now let’s make some of our own. Take a wide, flat pan, such as the kind you’d bake cookies in.

现在，咱们来自己制作陨石坑吧。找一个宽的平底锅，类似于平时烘焙饼干的那种。

Take it outside, because this gets kind of messy! Poor flour or baking soda⁵ or sand across the bottom so it makes a thick, flat surface.

最好到户外做，因为实验现场会一团糟。将面粉、小苏打或沙子倒进锅底，形成一层厚实、平坦的表面。

That’s your undisturbed moon.

这就像未受到过撞击的月球表面。

1 craters   

n.火山口( crater的名词复数 )；弹坑等

参考例句：

• Small meteorites have left impact craters all over the planet's surface. 这个行星的表面布满了小块陨石留下的撞击坑。 来自《简明英汉词典》
• The battlefield was full of craters made by exploding shells. 战场上布满弹坑。 来自《现代英汉综合大词典》

2 meteorites   

n.陨星( meteorite的名词复数 )

参考例句：

• Small meteorites have left impact craters all over the planet's surface. 这个行星的表面布满了小块陨石留下的撞击坑。 来自《简明英汉词典》
• One theory about the existence of extraterrestrial life rests on the presence of carbon compounds in meteorites. 地球外存在生命的理论是基于陨星上存在碳化合物质这一事实的。 来自《简明英汉词典》

3 literally   

adv.照字面意义，逐字地；确实

参考例句：

• He translated the passage literally.他逐字逐句地翻译这段文字。
• Sometimes she would not sit down till she was literally faint.有时候，她不走到真正要昏厥了，决不肯坐下来。

4 binoculars   

n.双筒望远镜

参考例句：

• He watched the play through his binoculars.他用双筒望远镜看戏。
• If I had binoculars,I could see that comet clearly.如果我有望远镜，我就可以清楚地看见那颗彗星。

5 soda   

n.苏打水；汽水

参考例句：

• She doesn't enjoy drinking chocolate soda.她不喜欢喝巧克力汽水。
• I will freshen your drink with more soda and ice cubes.我给你的饮料重加一些苏打水和冰块。