If the grass isgreener in the other fellow’s yard - let him worry about cutting it. ……

关于月球的基本常识，你知道多少？The moon is our closest neighbor in space. But how much do we really know about...’s start with the basics. Our moon is about 384,400 kilometers away from Earth, according to NASA ……

Nine’s potential existence would help make our own solar system a little less unique in the universe... orbits of six objects beyond the Kuiper belt may hint that a ninth planet about 10 times the mass ……

If the grass is greener in the other fellow’s yard - let him worry about cutting it.Fred Allen (American actor,1894-1956) ……

“随它去” 英语怎么说？Let it be例句: Don’t worry about it. Let it be.别担心了，随它去吧。 ……

'A newspaper for you'Dear young friends,From today, you have an English newspaper of your own — 21st Century Teens Junior Edition. As a long-time English teacher and adviser to China Daily, let me ……

— and about the same size as our Sun. The newly discovered planet moves in an orbit similar to Jupiter... centered at about Earth-Sun distance, and in that gap ... an Earth-mass planet could exist ……

Left: I feel a little cold – my skirt is being blown about.Right: Don’t worry – we can warm... and travel back in time to our own age.Left: No way! The magic power might send us to a strange place ……

. And the finding reveals a solar system more similar to our own than anything else found so far.The planet... for our year. Its daytime surface temperature could be extremely hot."The planet's surface conditions ……

•圣埃克苏佩里) wrote it in 1943. Let’s find out more.The little prince lives on a small planet (星球) B... own planet.Characters The roseI am the little prince’s lover (爱人). I love him very much but I am ……

It’s been above our heads since the beginning of humankind, but not a lot was known about Earth... isn’t as mysterious as it once was.So what exactly do we know about it? Let’s start with the basics ……

. But, conditions on Mars may have resembled our own planet in its distant past. Life could have... oceans, its land area is about equal to that of our planet.Q: Have spacecraft explored Mars before ……

? To answer these questions, first let’s take a look at what our Earth’s surface (表面) is made... and the top of the mantle make up a thin skin on the surface of our planet. This skin is not all in one ……

The Amazon rainforest has been described as the “lungs of our planet”. More than 20% of the planet’s oxygen is produced there! ……

The Amazon rainforest has been described as the “lungs of our planet”. More than 20% of the planet’s oxygen is produced there! ……