1. The first animals on this living sphere, the Earth, were primitive marine animals, and then around 500 million years ago these sea animals developed shells.
    在地球这个有生命的星球上，最早的动物是原始海洋动物。后来，在大约5亿年前，这些海洋动物进化成甲壳动物。

2. Two years ago, a 15-member team at the 115-year-old teaching hospital, under pressure to cut costs from a health maintenance organization (HMO), was given permission by the hospital's top manager to find a way to get the tube removed sooner.
    两年前，出于一家保健组织（HMO）要求减少成本的压力，这家有115年历史的教学医院组建了一支15人小组，他们得到医院总经理的许可来研制一种方法，以便尽早去掉导管。

3. The phrase "emotional intelligence" was coined by researchers five years ago to describe qualities like understanding one's own feelings, sympathy for the feelings of others and "the regulation of emotion in a way that enhances living&
    "情感智能"一词是研究人员五年前创造出来的，用以描绘人的一些素质，诸如对自身感觉的了解，对他人感觉的同情，以及"调节情感以更好地生活"的能力。

4. Queen Elizabeth and French President Francois Mitterrand will ride a train downward into the $15 billion Channel Tunnel today, crossing the English Channel by land for the first time since it was a marsh 8,000 years ago.
    今天，伊丽莎白女王和法国总统弗朗索瓦·密特朗将乘火车进入造价达150亿美元的海峡隧道，首次由陆地穿越8,000年前曾是一片沼泽地的英吉利海峡。

5. Nearly 100 years ago, the astronomer, Schiaparelli, thought the marking to be canals.
    而大约在一百年前天文学家夏帕雷里认为,这些条痕是运河.

6. Not that long ago!
    不，没有那么久。

7. 30,000 years ago they went across the land bridge and settled down in new homes.
    三万年前，他们跨过连接两洲的地峡，在美洲建立了新居。

8. NANCY: That was one reason why we moved up to the North, a few years ago, and now look what has happened.
    南茜 这就是我们几年前搬到北方来的一个原因。现在你看这样的事情又发生了。

9. Next, insects developed, about 400 million years ago.
    而后，大约4亿年前，出现了昆虫。

10. He was buried in this cemetery three years ago.
    三年前他被埋葬在这个墓地里。