Meteoroids become meteors when they enter our atmosphere and meteorites when they hit the ground.

流星进入地球大气层时会变成流星，撞击地面时变成石。

Meteorites are rocks from space that have hit the ground and we have recovered.

“Meteorites（石）”是我们已经找到的，从太空撞到地面的岩石。

Those are the meteors, not to be confused with meteoroids or meteorites.

那些就是流星，要和流星石搞混。

The discovery provides crucial evidence of the existence of impact ejecta from nearby craters in the sampling areas of the lunar probe.

这一发现为月球探测器取样区域附近石坑中存在撞击喷出物提供了关键证据。

The Union said it was just too small to clear its path.

联合会称冥王星积太小以至于无法清轨道上的其它石。

The planet's gonna undergo this meteoric bombardment for, like, 5,000 years.

星球将遭受大概五千年的石轰炸。

Organic molecules could be the food for life, or they could be the product of life, or maybe they're from something all together different such as geology or meteorites that were deposited into the lake.

有机微粒可以成为生命的食物，也可能是生命的产物，者也许它们同的地方，比如沉积在湖中的地质石。

Among the new features on this rover a terrain relative navigation, if you see that sort of red triangle, a camera in there is going to be taking images of Mars as it parachutes down into a crater.

在这辆飞船的新功能中，有一种叫“地形相对导航”的功能，你看到红色的三角状物了吗，那里的一个相机将在降落到石坑内时拍摄火星的照片。

For instance, the rim of the crater that Curiosity is in, pan left and you can see another crater estimated to be three miles wide.

比如在“好奇号”所在的石坑边缘，往左移点，您会看到另一个大概三英里宽的石坑。

The stone called lonsdaleite came here on a meteorite.

这种叫做朗斯代尔石的石头于这里的一块石。

There are a lot of mysteries outside the crater.

石坑外面有很多未解之谜。

The site of a lake formed more than 3.5 billion years ago.

这个石坑形成于35亿年前。

With Magellan images we see really small number impact craters and such a small numbers about a thousand, because we know the radar which impact craters can actually date to surface too.

我们看到麦哲伦图像真的很小数量的石坑, 因为我们知道雷达表面的石坑实际上已经追溯到表面。

Thousands of tiny meteorites strike the earth every year but as far as we know the one seen this week in Canada wasn't one of them.

每年都有成千上万颗小石撞击地球，但据我们所知，本周在加拿大看到的那颗石并在其中。

In 1977, part of the crater collapsed and the hot lava inside burst out, with the fiery stream moving at speeds of up to 62 miles or 100 km an hour, devouring, incinerating, and destroying everything in its path.

1977年，石坑的一部分坍塌，里面的炽热熔岩喷发出，炽热的熔岩流以每小时 62 英里（一百公里）的速度移动，吞噬、焚化并摧毁沿途的一切。

And in these meteorites there were from 60 to 80 amino acids.

在这些石中有60到80个氨基酸。

The young Earth was once completely covered by impact craters.

年轻的地球曾经完全被石坑覆盖。

Ross guessed that this " iron mountain" must be a crashed iron meteorite.

罗斯猜测这座“铁山”一定是一块坠落的铁石。

The Earth passes through that debris in April and the shooting stars that are really Thatcher's meteors burn up in our atmosphere.

地球在四月的时候穿过那些石碎片，也就是在我们大气层中燃烧的流星实际上是Thatcher彗星带的。

Twice in the twentieth century, large meteorite objects are known to have collided with Earth.

在20世纪，大型石撞击地球曾发生过两次。