问答题

但是,对于所有的正在进行的激动人心的工作而言,科学远没有达到一个能塑造完美的人的美好新世界的景象——或者甚至于说是塑造一个美好的番茄。在基因治疗普及之前,仍然需要做大量研究。如果许多疾病真的可以治疗的话,那将花上数十年的时间。
就短期而言,遗传筛选将是运用新技术的最可行的办法。在治疗各种DNA缺陷之前,医生能够检测到它们。在某些情况下,这些信息可以延缓疾病的发作或是减轻它的作用效果。例如,一个有着遗传性易患心脏病体质的人可以进行低脂肪的饮食。如果科学家测出由于制造一种重要蛋白质的基因存在缺陷,从而导致这种蛋白质丢失的话,也许科学家就可以给这位病人提供人工蛋白质。然而,在其他的情况下,对于阻止由于基因突变而导致的不幸几乎无能为力。

【参考答案】

For all the fevered work being done,however,science is still......

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For most of human history, the dominant concerns about energy have centered on the benefit side. Inadequacy of energy resources of the technologies for harvesting, converting, and distributing those resources has meant insufficient energy benefits to human beings and hence inconvenience, and constraints on its growth. The 1970’s, then, represented an turning point, Energy was seen to be getting costlier in all respects. It began to be believable that excessive energy costs could pose threats on a par with those of insufficient supply. It also became possible to think that expanding some forms of energy supply could create costs exceeding the benefits. The crucial question at the beginning of the 1990’s is whether the trend that began in the 1970’s will prove to be temporary or permanent. Is the era of cheap energy really over, or will a combination of new resources, new technology and changing geopolitics bring it back One key determinant of the answer is the staggering scale of energy demand brought forth by 100 years of population growth and industrial demand. Except for the huge pool of oil underlying the Middle East, the cheapest oil and gas are already gone. Even if a few more giant oil fields are discovered, they will make little difference against consumption on today’s scale.Oil and gas will have to come increasingly,for most countries,from deeper in the earth and from imports whose reliability and affordability cannot be guaranteed.