If it had hit the Earth, it would have made a crater 100 miles across and thrown up an immense cloud of dust.
如果它撞上了地球，就会砸出一个100英里宽的大坑并扬起巨大的尘埃云团。
It went across one fourth of the earth.
它跨越了地球的四分之一。
Many food packages are flown halfway across the earth.
许多食品包装被空运到半个地球以外的地方。
The Swiss couple want to travel across the world's oceans and climb the highest mountain on every continent to promote Earth-friendly ways of life.
这对瑞士夫妇希望通过旅行跨越世界上的海洋和爬每个大洲最高的山峰去推动与地球和谐的生活方式。
Using the Moon to view Earth recreates the basic geometry of exoplanet searches, as well as averaging the effect across the entire atmosphere.
用月亮来观察地球重新建立了外星行星凌日的基本几何学原理，同时平衡了穿过整个大气层的影响。
This projection provides data measured in meters across the globe, basing the shape of the earth on a sphere model.
这个投影基于地球的形状是球体模型的前提提供了以米测量的地球数据。
To conceptualize this, imagine you're traveling across the Earth in a straight line, heading east.
为了更直观地理解上述内容，可想象一下你正在以直线方式向东穿越地球。
We were seized by a frenzy: we began to gallop across the continent, through the savannas and forests that had recovered the earth, burying cities and roads, obliterating all trace of what had been.
我们的心中充满了愤怒：我们在大地上疾速奔驰，穿过草原和森林- - -它们覆盖了原来的城市和马路，重新恢复了生机，所有曾经发生过的一切都被湮灭了痕迹。
Explanation: Staring across interstellar space, the alluring Cat's Eye nebula lies three thousand light-years from Earth.
解说：透过星际望远镜可以看到距离地球三千光年的迷人的猫眼星云。
During this period, the shadow of the Earth will slowly drift across the moon.
在这个过程中，地球的影子会缓慢飘过月亮。
The surrounding countryside is a dry patchwork of millet and corn fields covered with the fine yellow silt found across the Loess Plateau, one of the most erosion-prone places on earth.
乡下是干涸斑驳的高粱玉米地，黄土茫茫，横亘黄土高原——这是地球上最容易被冲蚀的地方之一。
Lombard next chose an unusually high and thick clump of brush, and cleared a small space three feet across in the centre of it, scattering twigs on the uncovered earth to keep off its chill.
伦巴第先生在一丛较厚的灌木中清出了一个三英尺见方的空地，让后将碎枝铺在地上隔绝寒冷的地气。
The sound of the cackling kookaburra rang out across the earth.
笑翠鸟清脆的叫声响彻地球。
They like to gather photons that have been traveling across time and space since well before Earth was born, some 4.5 billion years ago.
他们喜欢收集穿越时间，从地球诞生之时——大约45亿年之前——起开始旅行的光子。
In America, the famous aerial pictures of Long Island's Levittown in the 1950s, which showed identical, boxy houses marching across bare earth, helped fix a depressing image of suburbia.
1950年时，美国著名的Levittown长岛航摄照片就展示了四四方方的像火柴盒的房子横跨在光秃秃的土地上，他对解决不景气的郊区景象有很大的帮助。
Across the earth: it no longer knows.
划过大地：它不再知道。
Head across the salt plain to the Dallol volcano, the lowest on earth, if that's not hot enough for you.
如果你觉得不够热的话，可以穿过盐湖，到Dallol火山——世界最低的火山去看一看。
Probably because I don't have a mother, at least if I do, she's halfway across the earth.
很可能是因为我没有妈妈，至少如果我这么做了，她就在穿过地球的途中。
Today, environmental awareness and activism are on the rise across the world -proof that Earth day's teachings have begun to change all of us, and change the environment we share.
今天，环境意识和能动性在全世界范围内日渐高涨——证明了“地球日”的教育已开始改变我们所有的人，也改变了我们共同生存的环境。
Such asteroids would rapidly have adopted orbits that cut across those of the inner planets, including Earth.
这些小行星在横越其它内部行星后就会快速改变轨道，其中也包括地球。
The 1815 eruption of Indonesia's Tambora – one of the most violent ever recorded on Earth – led to a disastrously cold summer across much of the globe in 1816.
1815年印度尼西亚坦博拉火山爆发是有记录以来地球上最猛烈的火山爆发之一，也导致了1816年席卷大半个地球的灾难性的冷夏。
Who amongst us hasn't seen a Great Dane trotting across Broadway and said: Where on Earth is that thing going home to?
敢问我们中间谁没有过碰到一条大丹犬在百老汇游荡的窘况，我打包票你们说过：这东西到底是要去哪儿？
In this movie, a comet miles across is headed toward Earth, sure to cause a mass extinction if it hits.
在这部影片里，以颗直径几英里的彗星直奔地球而来，一旦撞上，就会是天崩地裂的大灾难。
The antennae installed across Europe will work at the lowest FM frequencies accessible from Earth and will be connected using sophisticated computing and high-speed Internet.
遍布欧洲各地的无线电天线将接收地球上所能接受到的频率最低的无线电信号，并连接到高速互联网，以便对这些数据进行复杂的运算。
It is located 3, 800 light-years away from Earth, inside the Orion spur — the same partial spiral arm of the Milky way where our solar system is located. The nebula is nearly 240 light-years across.
它跨度近240光年，位于猎户座旋臂里，离地球3,800光年远；而我们的太阳系也在银河系同样的旋臂中。
While I was at the Normal School, when I first came across the information in some reader that the Sun was hundreds and thousands of times as big as the Earth, I at once disclosed it to my mother.
我在师范学堂念书时，在某个读本上头一次看到说，太阳比地球大千百倍，我立刻把这个说法告诉母亲。
The study, “Acidification of Earth: An Assessment across Mechanisms and Scales, ” is available online.
研究报告“地球的酸性过程：对人类活动机制和影响的一项评估”可以在线查阅使用。
The study, “Acidification of Earth: An Assessment across Mechanisms and Scales, ” is available online.
研究报告“地球的酸性过程：对人类活动机制和影响的一项评估”可以在线查阅使用。
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