GWD-31-Q28 Dated to be/dated at

topbabysun

GWD-31-Q28


Rock samples taken from the remains of an asteroid about twice the size of the 6-mile-wide asteroid that eradicated the dinosaurs has been dated to be 3.47 billion years old and thus is evidence of the earliest known asteroid impact on Earth.

A. has been dated to be 3.47 billion years old and thus is B. has been dated at 3.47 billion years old and thus

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

D. have been dated as being 3.47 billion years old and thus

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

请问谁有证据证明dated to be...years old是错的或者不如dated at?

xihahiphoop

be dated to be 3.47 billion years ago
be dated at 3.57 billion years old

Bosscat23

OG上都说了，dated at是固定搭配：追溯到某一具体时间的意思。

xiaodaben

那我就不明白了，既然dated at 是追溯到某一具体时间的意思，那么就是说n years old 是一个具体的时间？
n years old 不是n 岁的意思吗？

rocmoon

be dated to be 3.47 billion years ago
be dated at 3.57 billion years old

-- by 会员 xihahiphoop (2011/6/6 20:35:58)

1楼说的对，不能只看to be/at，要看后边跟的是ago还是old。
楼主可以参考下NG和EvoWiki上关于dated的用法
http://news.nationalgeographic.com/news/2003/07/0717_030717_bajarockart.html
http://evolutionwiki.org/wiki/Living_snails_were_C14_dated_at_2,300_and_27,000_years_old

zwhjzwhj

LS的NG那个说的是date to

有谁来confirm一下这个
be dated to be 3.47 billion years ago
be dated at 3.57 billion years old

或者，是 be dated to 3.47 billion years ago （没be）