离开地球

美国国家航空航天局（NASA）正在开展一项新的研究活动，即无需离开地球，就可以揭示太空最深处是否存在外星生命体。

NASA is launching a new project to help it better understand the deepest parts of space , without ever leaving Earth .

如果想要离开地球，那么速度变化量在垂直方向上至少需要每秒13千米，但排气速度最大也就约每秒4.5千米，因而所需燃料重量和飞船总重量之间的比值至少为e（13.5/4.5）≈20。

For leaving Earth , we need a of upward of 13 km / s , and is limited to about 4.5 km / s , which gives a fuel-to-ship ratio of at least .

它们被当做特殊地区，NASA禁止当前的探测机器人进入，因为这些探测器没进行过彻底消毒，NASA担心它们离开地球时携带着的微生物可能会污染火星。

They are treated as special regions that NASA 's current robotic explorers are barred from because the rovers were not thoroughly sterilized , and NASA worries that they might be carrying microbial hitchhikers from Earth that could contaminate Mars .

我希望咱们一离开地球，死亡就不算病了。

I expect they cured death the instant we left earth .

第一个离开地球的人是谁？

Who were the first people to leave the Earth ?

我不想离开地球。瑞拉忧伤地说。

I don 't want to leave earth , Rilla said sadly .

每年月球大约离开地球两英。

The moon moves about two inches away from the Earth each year .

所以它们毅然决定离开地球。

So they eventually decided they would leave earth by their own means .

你们为什么离开地球？发生了什么事？我问。

' Why did you leave Earth ? What happened ? 'I asked .

宇航员在离开地球时拍摄下了著名的“蓝色玻璃球”（因为看上去就像孩子们爱玩的玻璃弹球）的地球照片。

The crew take The Blue Marble image as they leave the Earth .

不，不，不，那艘飞船不能离开地球。

No , no , no , that ship must never leave this earth .

他想明天离开地球。”

He wants to leave Earth tomorrow . "

那么我假设星际联邦离开地球有一段时间。

Then I assume the Confederation stayed away from Earth for a period of time .

这是因为当你离开地球时，空气变得越来越稀薄而引起的。

This occurs because the air gets thinner as you go away from the earth .

我们离开地球时对宇宙中所看到的地球的模样没有心理准备。

I wasn 't quite prepared for the view of the earth as we left .

确切来说，既然它能离开地球，那么它就不能被看作是地球的卫星。

Technically , it does not count as a moon , since it leaves Earth .

飞行轨迹不是和地球相交，就是离开地球而进入宇宙空间。

The flight path would then either intersect the earth , or go off into space .

当一个物体离开地球时，地球引力的强度就减弱。

As an object gets away from the earth , the strength of the pull weakens .

成功的候选人在他们离开地球之前将接受至少八年的训练。

Successful candidates will receive a minimum of eight years of training before they leave Earth behind .

您会体验到一种深刻和巨大的，想要离开地球返回“家园”的渴望。

You may experience a deep and overwhelming desire to leave the planet and return to Home .

公司称，候选人在离开地球前将接受为期最短8年的培训。

Candidates will receive a minimum of eight years training before leaving Earth , the company says .

不过，有些科学家却认为，离开地球是维系未来人类命脉的必要手段。

Still , some scientists think that leaving Earth is a necessary part of humanity 's future .

但它们都产生了一种帮助火箭离开地球进入太空的力。

But they all make a force to help the rocket leave Earth and get into space .

如果没有引力，我们人本身以及其他东西就会离开地球。飞向太空。

If there were no gravitation , we and everything else would fly off the earth into space .

现在，假设一个人离开地球，升到空中一段距离。

Now , suppose a human being goes some distance up into the air , away from the earth .

现在假设你即将乘坐太空飞船离开地球，永远不回来了。

Assume for a moment that you are going to be leaving earth on a spaceship , never to return .

不久前离开地球地阿斯屈拉号飞船准备飞行三百英里进入太空。

The spaceship Astra which left the earth a short time ago , will be travelling three hundred miles into space .

有一天，人类离开地球因为地球被严重污染了，并且有太多需要清除的垃圾。

One day , humans leave Earth because it is very polluted and there is too much rubbish to clean up .

据3000年间的天文记录的计算也证实月亮在慢慢地离开地球而去。

According to the3000 years of astronomical records also confirmed that the calculation of the moon is slowly leaving the earth away .

然后，当他们离开地球引力区，他们便无法停留在一个固定位置。

Later , when they leave the zone of the earth 's gravitation , they are unable to stay in one place .