That's about how high an object would have to be orbiting straight up from the equator to constantly remain directly above the exact same spot on the rotating planet Earth.
这大约是一个物体从赤道沿轨道垂直向上运行的高度，这样它就可以一直保持在地球同一地点的正上方。
In the rusty red deserts of South Africa, steep-sided rocky hills called inselbergs rear up from the plains like the bones of the earth.
在南非铁锈般红色的沙漠中，被称为岛山的陡峭岩石山丘从平原上拔地而起，就像大地之骨。
Venus has long been held up as a cautionary tale for everything that could go wrong on a planet like earth.
长期以来，金星一直被认为是一个警示故事，告诉我们在像地球这样的行星上，任何事情都可能出错。
What on earth will he get up to next?
他下一步究竟要干什么？
They banked the earth (up) into a mound.
他们把土堆成一个土丘。
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。
地球在变暖。
Think of wetlands as a giant sponge: the earth soaks up a lot of this water that's continually flooding the surface, which increases the amount of water below.
把湿地想象成一块巨大的海绵：地球吸收大量的不断涌向地表的，增加了地表以下水量的这些水。
Then Houston, the control centre on the earth, called up and told me to use the tape to tape the bottom of the handrail and pull it off the telescope.
然后休斯顿，地球上的控制中心，打电话给我，让我用胶带把扶手的底部粘上，然后把它从望远镜上拉下来。
I like to smell the earth when it's turned up.
我喜欢闻泥土翻开后的味道。
They are working in the earth now—pushing up pale green points because the spring is coming.
它们现在正在土壤里使劲儿——把嫩绿的芽拱出来，因为春天就要来了。
"Things are crowding up out of the earth," she ran on in a hurry.
“土里的东西都在往外钻。”她急急忙忙地说。
One step in its formation on Earth involves microorganisms; they actually speed up the formation of jarosite dramatically.
在地球上形成黄钾铁矾的其中一个步骤涉及到微生物；实际上，微生物能大幅加快黄钾铁矾的形成。
"If I have a spade," she whispered, "I can make the earth nice and soft and dig up weeds."
“如果有把铲子，”她低声说，“我就能把地弄得又软又漂亮，还能把杂草挖出来。”
Luna 16 landed on the lunar surface (in total darkness, no less), collected moon rocks, packed them up, and returned them to Earth.
“月球16号”降落在月球表面(完全是在黑暗中)，收集了月球岩石，打包，然后带回地球。
Understanding this cycle is important, not only because it sustains life on Earth, but also because it is bound up with the rate of global warming.
理解这种循环很重要，不仅因为碳循环维持地球上的生命，而且因为它对于全球变暖的速度有密切关系。
They bear a strong resemblance to river systems on Earth, and geologists think that they are dried-up beds of long-gone rivers.
它们与地球上的河流系统非常相似，地质学家认为它们是早已消失的河流留下的干涸的河床。
At the edge of darkness, after about eight hours, I turned around and saw the Earth from our altitude at Hubble, 568 kilometers up.
在黑暗的边缘，大约8个小时后，我转过身来，从哈勃望远镜上看到了568公里高处的地球。
She surprised him several times by seeming to start up beside him as if she sprang out of the earth.
有几次，玛丽让他吃了一惊，因为这小姑娘神不知鬼不觉地突然出现在他身边，仿佛是从地底下钻了出来。
Instead of giving up Earth—again—this time we're taking it with us.
这次我们不是再次放弃地球，而是将它带走。
The twenty that make up the proteins on Earth are all left-handed.
组成地球上蛋白质的那20个（氨基酸）都是左旋氨基酸。
They would rise up from the earth and many other animals would also make their first appearance of the year.
它们会冒地而出，许多其他的动物也会在这一年里首次出现。
On Earth, gravity helps a plant's stems and roots to find "up" and "down".
在地球上，重力有助于植物的茎“向上”生长，根“向下”生长。
The moon's gravity is a sixth as strong as the earth's, so Chang'e-4's experiment was a test: would the earth plants know which way was up on the moon?
月球的引力是地球引力的六分之一，所以嫦娥四号的实验是一个测试：地球上的植物能知道月球上哪个是向上的方向吗？
Together, they can give light to an area of up to 6,400 square kilometers on the Earth for 24 hours.
它们合在一起可以给地球上高达6，400平方公里的区域提供24小时的照明。
Many people look up to Yuan Longping because he spent all his life working for people on the earth.
许多人敬仰袁隆平，因为他一生都在为地球上的人们而工作。
Afraid that in her unclear state of mind she might fall off the rock to her death, Grant climbed on all fours up a tight, narrow path by digging into the earth with his fingers and feet until he reached Paula.
担心她在神志不清的状态下会从岩石上掉下来摔死，格兰特手脚插入泥土，四肢并用地沿着一条狭窄的小路往上爬，一直爬到宝拉身边。
The sprouts have pushed up the earth.
嫩芽把土顶起来了。
The sun warmed up the earth nicely.
太阳把大地照得暖融融的。
The sun warmed up the earth nicely.
太阳把大地照得暖融融的。
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