求教GWD上的一道题！！！GWD3-Q5 to Q7

meggietian

GWD3-Q5 to Q7:
In 1994, a team of scientists led by David Mckay began studying the meteorite ALH84001, which had been discovered in Antarctica in 1984. Two years later, the McKayteam announced that ALH84001, which scientists generally agree originated on Mars, contained compelling evidence that life once existed on Mars. This evidence includes the discovery of organic molecules in ALH84001, the first ever found in Martian rock.
Organic molecules—complex, carbonbased compounds—form the basis for terrestrial life.The organic molecules found in ALH84001 are polycyclic aromatic hydrocarbons, or PAH’s.When microbes die, their organic material often decays into PAH’s.
Skepticism about the McKayteam’s claim remains, however.For example, ALH84001 has been on earth for 13,000 years, suggesting to some scientists that its PAH’s might have resulted form terrestrial contamination. However, McKay’steam has demonstrated that the concentration of PAH’s increases as one looks deeper into ALH84001, contrary to what one would expect from terrestrial contamination. The skeptic’sstrongest argument, however, is that processes unrelated to organic life can easily produce all the evidence found by McKay’ steam, including PAH’s.For example, star formation produces PAH’s.Moreover, PAH’s frequently appear in other meteorites, and no one attributes their presence to life processes. Yet McKay’steam notes that the particular combination of PAH’s in ALH84001 is more similar to the combinations produced by decaying organisms than to those originating form nonbiological processes.

Q5: The passage asserts which of the following about the claim that ALH84001 originated on Mars?

A.It was initially proposed by the McKayteam of scientists.

B.It is not a matter of widespread scientific dispute.

C.It has been questioned by some skeptics of the McKayteam’swork.

D.It has been undermined by recent work on PAH’s.

E.It is incompatible with the face that ALH84001 has been on Earth for 13,000 years.

这道题C为什么不对呢？第二段开头说了呀 Skepticism about the McKayteam’s claim remains, however. 正确答案是B

izhuimeng

楼主看文章不仔细。
文中说的是有人质疑 McKayteam 的观点：ALH84001 含有证明火星上存在生命的证据。而至于 ALH84001 的来源，文中明确说明是早已定论得到共识的，所以 It is not a matter of widespread scientific dispute.
“ALH84001, which scientists generally agree originated on Mars, contained compelling evidence that life once existed on Mars.” 这句话中，中间的定语从句和 McKayteam 的观点无关。

stellapass

我想求教一下izhuimeng~这句话应该怎样翻译呢： However, McKay’steam has demonstrated that the concentration of PAH’s increases as one looks deeper into ALH84001, contrary to what one would expect from terrestrial contamination. 谢谢啦

izhuimeng

我想求教一下izhuimeng~这句话应该怎样翻译呢： However, McKay’steam has demonstrated that the concentration of PAH’s increases as one looks deeper into ALH84001, contrary to what one would expect from terrestrial contamination. 谢谢啦

-- by 会员 stellapass (2011/8/1 9:47:34)

试着翻译一下：
但是，McKay 小组发现越接近 ALH84001 的内部，PAH 的浓度越高，这与地球污染说的预期结果相反。
（换言之，如果ALH84001 里的 PAH 是源于地球环境的污染，那么，应该是越往里浓度越低才对。现在的情况是越往里浓度越高，所以排除了 ALH84001 里的 PAH 来自地球的说法。）

stellapass

晓得啦~谢谢啦~