综合写作：
The term “Carolina bays” is applied to the thousands of shallow circular or oval land depressions found in the eastern United States. Their name stems from the fact that bay trees are frequently found growing in them. Scientists have long wondered how the bays were formed. Some researchers today argue that a massive meteorite must have exploded in the atmosphere and that the bays were formed when the meteorite fragments hit the ground. Some of the features of these depressions support the meteorite impact theory.
First, a meteorite explosion can account for the fact that the depressions are asymmetrical: the rim of white sand on one (southeastern) side of the bay is always higher than the rim on the opposite (northwestern) side. It is well known that meteorite explosions can create craters in which materials have been pushed more to one side than the opposite one, depending on the angle at which the fragments hit the ground.
Second, a meteorite explosion can explain why the sand found near and along the rims of the bays differs from most sand found in the eastern United States. Most sand is thinly coated with iron. The white sands surrounding the depressions have no iron coating; somehow, the original iron coating of this sand was removed. Supporters of the impact theory point out that meteorite impacts create intense heat and speculate that this heat burned the iron out of the sand.
Third, buckyballs have been found in some Carolina bays. A buckyball is a distinctive form of carbon that is associated with impacts. Carbon achieves the buckyball state when it is put under extremely high pressure. The force of a meteorite explosion is sufficient for buckyballs to form.
学术写作：
Instructions: Your professor is teaching a class on sociology. Write a post responding to the professor’s question. In your response you should:
- express and support your personal opinion
- make a contribution to the discussion in your own words
An effective response will contain at least 100 words.
Dr. Achebe
This week, we will be discussing space exploration. Some people think that it is a waste of money for governments to fund space exploration. Others disagree with this view arguing that space exploration is a valuable and necessary investment for our future. They think that it is worth it for governments to fund space exploration. I want to know what you think about this topic. Do you think that governments should fund space exploration? Why or why not?
Kelly
I don’t think that governments should fund space exploration because it will be too costly to build spaceships and develop related technologies. Though space exploration tech costs billions, it doesn’t offer direct benefits to most people, which makes its funding a controversial issue.
Andrew
Personally, I do think that all the costs will be worth it. The potential scientific discoveries and technological advancements could have far – reaching impacts that justify the initial investment. Imagine the new inventions that might come from this exploration. Such technology could greatly improve our everyday lives.
