种挑战：“本人所作结论在此。请
证其谬！”(2) 别的研究人员会试图重复这一实验，实验成功的次数越多，其结果就越有可能是可靠的。爱因斯坦说 得对：“再多的实验也永远不能证明我正确，而一项实验随时就能证明我错误。” 9 In August 1996, NASA announced the discovery in Antarctica of a meteorite from Mars that might
contain evidence of ancient life on another world. (3)As President Clinton said that day, the possibility
that life existed on Mars billions of years ago was potentially one of the great discoveries of our time.
1996年8月，美国国家航天和航空局宣布在南极洲发现了一颗来自火星的陨石，其中可能包含着其他星球存
在古老生命的证据。(3) 正如克林顿总统那天所说，发现亿万年前火星上可能存在生命这件事, 有可能是我们时代 最伟大的发现之一。
10 After the excitement wore down and initial papers were published, other researchers began
looking at samples from the same meteorite. (4) Some concluded that the \
mostly contamination from Antarctic ice or that there was nothing organic at all in the rock.
当兴奋和激动慢慢平息，首批论文发表之后，其他研究人员开始研究取自同一颗陨石的样本。(4) 有些人得出
结论说，这些“生命的证据”大多来自南极冰的污染，或者说那块石头里根本就没有有机物。
11 Was this a failure of science, as some news reports trumpeted?
这是某些新闻报道所鼓噪的科学的失败吗？
12 No! It was a good example of the scientific method working the way it is supposed to. Scientists
spend years on research, announce their findings, and these findings are examined by other scientists.
That's how we learn. Like climbing a mountain, we struggle up three feet and fall back two. It's a
process filled with disappointments and reverses, but somehow we keep moving ahead.
不！这正是科学研究以其应有的方式进行的一个范例。科学家经过多年研究发布成果，其成果再由其他科学家
加以检验。我们就是这样增进知识的。正如爬山，我们费力爬上三英尺，又掉下去两英尺。这是个充满失望与挫折
的过程，但不管怎样，我们一直往前迈进。 Unit 4 American Dream
Part Ⅱ Text A A Tonh Trivisonno's American Dream
The American Dream means different things to different people. But for many, particularly
immigrants, it means the opportunity to make a better life for themselves. For them the dream is
that talent and hard work can take you from log cabin to White House. Tony Trivisonno did not rise
quite so high, yet he managed to make his own dream come true.
美国梦对不同的人有不同的意义。但对许多人，尤其是对移民而言，它意味着改善自己生活的机会。对于他们，
美国梦的含义就是才能与勤劳能让你从小木屋走向白宫。托尼·特里韦索诺并没有爬到那么高，但他成功地使自己的 梦想成真。
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Tony Trivisonno's American Dream Frederick C. Crawford
1 He came from a rocky farm in Italy, somewhere south of Rome. How or when he got to America,
I don't know. But one evening I found him standing in the driveway, behind my garage. He was about five-foot-seven or eight, and thin. 托尼·特里韦索诺的美国梦 弗雷德里克·C·克罗弗德
他来自意大利罗马以南某地一个满地石子的农庄。他什么时候怎么到美国的，我不清楚。不过，有天晚上，我
看到他站在我家车库后面的车道上。他身高五英尺七、八左右，人很瘦。
2 \mow your lawn,\comprehend his broken English.
“我割你的草坪，”他说。他那结结巴巴的英语很难听懂。
3 I asked him his name. \your lawn.\afford a gardener.
我问他叫什么名字。“托尼·特里韦索诺，”他回答说，“我割你的草坪。”我对托尼讲，本人雇不起园丁。
4 \into my house unhappy. Yes, these
Depression days were difficult, but how could I turn away a person who had come to me for help?
“我割你的草坪，”他又说道，随后便走开了。我走进屋子，心里有点不快。没错，眼下这大萧条的日子是不好
过，可我怎么能把一个上门求助的人就这么打发走呢？
5 When I got home from work the next evening, the lawn had been mowed, the garden weeded,
and the walks swept. I asked my wife what had happened. 等我第二天晚上下班回到家，草坪已修整过了，花园除了草，人行道也清扫过了。我便问太太是怎么回事。
6 \the yard,\assumed you had hired him.\
“有个人把割草机从汽车库里推出来就在院子里忙活起来，”她回答说，“我还以为是你雇他来的。”
7 I told her of my experience the night before. We thought it strange that he had not asked for pay.
我就把前晚的事跟她说了。我俩都觉得奇怪，他怎么没提出要工钱。
8 The next two days were busy, and I forgot about Tony. We were trying to rebuild our business and
bring some of our workers back to the plants. But on Friday, returning home a little early, I saw Tony
again, behind the garage. I complimented him on the work he had done.
接下来的两天挺忙，我把托尼的事给忘了。我们在尽力重整业务，要让一部分工人回厂里来。但在星期五，回
家略微早了些，我又在汽车库后面看到了托尼。我对他干的活夸奖了几句。 9 \
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“我割你的草坪，”他说。
10 I managed to work out some kind of small weekly pay, and each day Tony cleaned up the
yard and took care of any little tasks. My wife said he was very helpful whenever there were any heavy objects to lift or things to fix.
我设法凑了一小笔微薄的周薪，就这样托尼每天清扫院子，有什么零活，他都干了。我太太说，但凡有重物要
搬或有什么要修理的，他挺派得上用场。
11 Summer passed into fall, and winds blew cold. \snow pretty soon,\
evening. \at the factory.\
夏去秋来，凉风阵阵。“克罗先生，快下雪了，”有天晚上托尼跟我说，“等冬天到了，你让我在厂里干扫雪的活。”
12 Well, what do you do with such determination and hope? Of course, Tony got his job at the factory.
啊，对这种执着与期盼，你又能怎样呢？自然，托尼得到了厂里的那份活儿。 13 The months passed. I asked the personnel department for a report. They said Tony was a very
good worker.
几个月过去了。我让人事部门送上一份报告。他们说托尼干得挺棒。 14 One day I found Tony at our meeting place behind the garage. \
一天我在汽车库后面我们以前见面的地方看到了托尼。“我想学徒，”他说。 15 We had a pretty good apprentice school that trained laborers. But I doubted whether Tony had
the capacity to read blueprints and micrometers or do precision work. Still, how could I turn him down?
我们有个挺不错的培训工人的徒工学校。可我怀疑托尼是否有能力学会看图纸、用千分尺，是否胜任做精密加
工工作。尽管如此，可我怎么能拒绝他呢？
16 Tony took a cut in pay to become an apprentice. Months later, I got a report that he had
graduated as a skilled grinder. He had learned to read the millionths of an inch on the micrometer
and to shape the grinding wheel with an instrument set with a diamond. My wife and I were
delighted with what we felt was a satisfying end of the story. 托尼减了薪水当了徒工。几个月之后，我收到报告，他已从徒工学校毕业，成了熟练磨工。他学会了在千分尺
上辨识一百万分之一英寸，会用镶嵌着金刚石的工具制作砂轮。我和太太都挺高兴，觉得他的事总算有了个令人满 意的结局。
17 A year or two passed, and again I found Tony in his usual waiting place. We talked about his work, and I asked him what he wanted.
一两年过去了，我在托尼惯常等我的地方又看到了__________他。我们聊起了他的工作，接着我问他有什么要求。
18 \town, he had found a house for sale, a complete wreck.
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“克罗先生，”他说，“我想买房。”在小镇边上，他看到有房出售，完全是幢破房。
19 I called on a banker friend. \loan money on character?\\
我去见一位当银行家的朋友。“人品贷款你干不干？”我问。“不干，”他说，“我们承担不起。没门。”
20 \man, a man of character, I can promise