TPO 08 恐龍滅絕 - 英檢

雖然我也不強，但是我試一下好了，有錯請指正，謝

※ 引述《Purlas (皮拉斯)》之銘言：
: Many plants and animals disappear abruptly from the fossil record as one moves
: from layers of rock documenting the end ofthe Cretaceous up into rocks
: representing the beginning of the Cenozoic (the era after the Mesozoic).
: 可以拆解和翻譯一下這句嗎?有點是懂非懂

Many plants and animals disappear abruptly from the fossil record
許多植物與動物突然的從化石的資料中消失

as one move
（開始說明是哪一段化石資料）

從 layers of rock (which is) documenting the end of the Cretaceous
至 rocks (which are) representing the beginning of ....

所以從as one move..後面，都是在描述植物與動物是從哪一段化石的資料中消失的


: 第十題
: Paragraph 5 lr has not been common at Earth’s since the very beginning of
: the planet’s history. Because it usually exists in a metallic state, it was
: preferentially incorporated in Earth’s core as the planet cooled and
: consolidated. lr is found in high concentrations in some meteorites, in which
: the solar system’s original chemical composition is preserved. Even today,
: microscopic meteorites continually bombard Earth, falling on both land and sea.

重點在
By measuring how many of these meteorites fall to Earth over a given period of
time, scientists can estimate how long it might have taken to deposit the
observed amount of lr in the boundary clay. These calculations suggest that a
period of about one million years would have been required. However, other
reliable evidence suggests that the deposition of the boundary clay could not
have taken one million years. So the unusually high concentration of lr seems
to require a special explanation.

藉著計算一特定時間有多少隕石掉落至地球上，科學家估計需要多久才可以沈積所發現
的Ir的量在 boundary clay。計算的結果估計要 1 million years。
然而其他可靠的正去顯示這boundary clay沒有沈積到1 million years。
所以一定有其他的解釋來解釋這麼高濃度的Ir


: 10. Paragraph 5 implies that a special explanation of lr in the boundary clay
: is needed because
: ○the lr in microscopic meteorites reaching Earth during the Cretaceous
: period would have been incorporated into Earth’s core
incorporated in Earth’s core是第一句一開始說地球形成時，在地球冷卻時所發生
的事，所以不是在Cretaceous period。另外，文章後面也有說是continually bombard
Earth, 是掉落在 both land and sea

: ○the lr in the boundary clay was deposited much more than a million years ago
沒，文章是說大約等於a million years所沈積的量，不是說早於a million years年前

: ○the concentration of lr in the boundary clay is higher than in microscopic
: meteorites
他沒有講到microscopic meteorites的量是多少，只有說最後沈積出來的量比估計
microscopic meteorites會帶來的量還要高


: ○the amount of lr in the boundary clay is too great to have come from
: microscopic meteorites during the time the boundary clay was deposited
: 不太懂為什麼答案是D?
: 為什麼銥的量會太多而不可能是來自隕石?
: 這一題從哪推出答案是D?
: 感謝回答

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