北师大版高中英语模块7--Unit 20 lessons3-2

[00:01.51]Einstein had already become world- famous
[00:04.21]when a young ex-lawyer,
[00:06.06]returning from the First World War,
[00:08.04]started work at the Mount Wilson Observatory¹
[00:10.39]in California.Using the most high-powered
[00:13.50]telescope of the time,he began the long slow
[00:16.57]process of exploring our galaxy².
[00:19.48]Edwin Huble was about to make astronomy's
[00:22.03]greatest breakthrough of the century.
[00:24.43]He discovered nebulae
[00:26.67]which were in fact galaxies³ like our won,
[00:29.28]millions of light years away from us,
[00:31.96]which proved that the universe was vastly
[00:34.16]larger than had previously⁴ been thought.
[00:36.91]Then,Hubble proved that the universe
[00:39.05]is actually expanding,
[00:40.95]and that the futher away galaxies are,
[00:42.93]the faster they move.
[00:45.50]In 1929,another far-reaching finding
[00:48.43]was made by the son of a Scottish shepherd.
[00:51.18]Before he went on holiday,
[00:52.98]Alexander Fleming left a dish
[00:54.77]with bacteria in it near the window
[00:56.93]of his laboratory.When he came back,
[00:59.14]he was just about to throw the dish away
[01:01.41]when he noticed something our of the ordinary.
[01:04.28]He double-checked and saw a blue mould
[01:06.52]in the dish around
[01:07.78]which the bacteria had been destroyed.
[01:10.76]This blue moud was in fact the natural
[01:13.41]form of pencicillin which Fleming realized
[01:15.85]was an effective way of killing⁵ bacteria.
[01:17.72]

1 observatory   

n.天文台，气象台，瞭望台，观测台

参考例句：

• Guy's house was close to the observatory.盖伊的房子离天文台很近。
• Officials from Greenwich Observatory have the clock checked twice a day.格林威治天文台的职员们每天对大钟检查两次。

2 galaxy   

n.星系；银河系；一群(杰出或著名的人物)

参考例句：

• The earth is one of the planets in the Galaxy.地球是银河系中的星球之一。
• The company has a galaxy of talent.该公司拥有一批优秀的人才。

3 galaxies   

星系( galaxy的名词复数 )； 银河系； 一群（杰出或著名的人物）

参考例句：

• Quasars are the highly energetic cores of distant galaxies. 类星体是遥远星系的极为活跃的核心体。
• We still don't know how many galaxies there are in the universe. 我们还不知道宇宙中有多少个星系。

4 previously   

adv.以前，先前（地）

参考例句：

• The bicycle tyre blew out at a previously damaged point.自行车胎在以前损坏过的地方又爆开了。
• Let me digress for a moment and explain what had happened previously.让我岔开一会儿，解释原先发生了什么。

5 killing   

n.巨额利润；突然赚大钱，发大财

参考例句：

• Investors are set to make a killing from the sell-off.投资者准备清仓以便大赚一笔。
• Last week my brother made a killing on Wall Street.上个周我兄弟在华尔街赚了一大笔。