天文学家装备了大得惊人和清晰得惊人的望远镜后,有史以来第一次记录到了太阳系外一颗行星反射出的光线。 Astronomers
armed with telescopes of awesome size and clarity have for the first time
recorded the reflected light of a planet outside our solar system. 生命是由原始单细胞生物进化到复杂多细胞而形成的。 Life
has evolved from primitive single-celled organisms to complex multicellular
ones. 臭氧在高层大气上形成了臭氧层,可以保护地球上的生命免受引起皮肤癌的紫外线的伤害。在含量较低时,会带来温室效应。 Ozone
forms a layer in the upper atmosphere, which protects life on Earth from
ultraviolet rays, a cause of skin cancer. At lower levels it contributes to the
greenhouse effect. 生物学家一直希望编制人体内30亿对DNA 碱基目录。而今在机器人和高速计算机的帮助下,人类基因组草图的绘制工作已比原定计划提前完成了。 It
has long been the expectations of biologists to catalog the 3 billion DNA base
pairs in the human body. Now the rough draft of the human genome has been
delivered ahead of schedule, with the help of robots and super-speed computers. 基因疗法可以在一定程度上治疗或减轻遗传疾病活缺陷。 To
a certain extent, gene therapy can cure or alleviate inherited diseases or
defects. DNA是一个梯状的双链核酸,构成了除少数病毒以外所有生物基因遗传的基础。 DNA
is a ladderlike double-stranded nucleic acid that forms the basis of genetic
inheritance in all organisms, except for a few viruses. DNA计算机的真正优势在于它可以同时对整个分子库的所有分子进行处理。 The
real advantage of the DNA computer is that it can act on the entire library of
molecules simultaneously. 研究人员早已制造出一种小得可以隐藏在病毒下面的晶体管。 Researchers
have already built a transistor so small that it can hide under a virus. 神经科医师利用磁共振成像仪观察大脑的工作情况,人的思维和情感可以生动地跃然屏幕之上。 Neurologists
use magnetic resource imagers to watch the brain at work, thoughts and feelings
vividly lighting up the screen. |
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