关于date back to以及dack at。

manna · 发表于 2010-5-2 08:06:47

34. GWD25-Q16B
A Harvard anthropologist has proposed that using fire to cook food could be dated back to almost two million years and that it could explain hominid features like having a large brain and small teeth.

A. using fire to cook food could be dated back to almost two million years and that it could explain hominid features like having
B. the use of fire to cook food could date back almost two million years and could explain such hominid features as
C. cooking food with fire could date back to almost two million years, explaining hominid features like
D. fire used to cook food could date back almost two million years ,explaining hominid features such as having.
E. fire used for cooking food could be dated back to almost two million years and explain hominid features like.

如果答案B中的date back改成 be dated back to……，是否还正确？
GMAT SC的题里，出现been dated at……的频率较高，
那么，date back和date at在用法上是否有主动及被动的限制呢？

manna · 发表于 2010-5-2 09:02:44

我怎么在大全里没有搜到任何dated at的项目？

-- by 会员 pennyconan (2010/5/2 8:22:28)

GWD31-Q28 E

Rock samples taken from the remains of an asteroid about twice the size of the 6-nuke-wideasteroid that eradicated the dinosaurs has been dated to be 3.47 billionyears old and thus is evidence of the earliest known asteroid impact onEarth.

A. has been dated to be 3.47 billion years oldand thus is

B. has been dated at 3.47 billion years old andthus

C. have been dated to be 3.47billion years oldand thus are

D. have been dated as being 3.47 billion yearsold and thus

E. have been dated at 3.47billion years old and thus are

这里有一题。

pennyconan · 发表于 2010-5-2 08:22:28

我怎么在大全里没有搜到任何dated at的项目？

manna · 发表于 2010-5-2 09:47:07

想了一下，不知道可否这样理解：

GWD31-Q28里，用be dated at是因为作者更多地是强调Rock samples被人（可以是考古学家等等）定位于X年代，
而GWD25-Q16里the use of fire to cook food之所以可以用date back，请着重于“back”这个词，感觉更多的是在强调一种主动性，这恰恰和句子后面的could explain相对应。

如果我用中文来翻译这两句话，我会这么描述：
the use of fire to cook food could date back almost two million years and could explain such hominid features a s a large brain and small teeth.
“用火烧饭” 可追溯到 20亿年前并且可解释……

Rock samples have been dated at 3.47billion years old
石头标本已被追溯到 34.7亿年前。

pennyconan · 发表于 2010-5-2 11:23:28

1.我刚刚Google了一下发现其实几乎没有be dated back to的用法，看来这是一个主动表被动的用法，类似sell well或者prove吧~

2.这里有提到be dated to be 在OG12#140里官方说是错的，只有be dated at
http://www.manhattangmat.com/forums/dated-at-vs-dated-to-be-t604.html

所以目前为止只有date back to和be dated at两种用法了

3.我倒是觉得虽然USE和Rock sample都是名词，但是use是动词性名词，Rock sample是标准的名词。第二题的***years old用在抽象的动词性名词上有点awkward。你觉得呢？我这个其实是知道答案推出来的，不一定对额。。。

OPEN DISCUSSION

manna · 发表于 2010-5-2 11:50:32

目前来说，date back to和be dated at较之其他用法，应该是最规范的了。
一般正确答案都是以这样的形式出现。
pennyconan，同意你的看法，呵呵。

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