2. 外语
  3. For high-risk propositions yielding high returns, there is nothing to beat the handful companies marketing eternal life. (31) th

For high-risk propositions yielding high returns, there is nothing to beat the handful companies marketing eternal life. (31) th

admin2009-06-24  21
问题     For high-risk propositions yielding high returns, there is nothing to beat the handful companies marketing eternal life. (31) the perceived rewards of being able to come hack to life (32) some point, the risks are huge: Who would want to chance a repeat of disco or Victorian mores, let (33) more meaningless millennium hype in 2999?
    There are (34), more immediate risks involved in the new business of cryonics, (35) is the deep freezing at death of human bodies for preservation and possible revival in future. The biggest problem is that, (36) now, it is impossible to freeze people and bring them back to life.
    On the other hand, if cryonics (37), you were already dead anyway.
    (38) it comes from the same root, kryos, the Greek word for cold, cryonics is not to be (39) with the mainstream sciences of cryogenics or cryobiology. These involve freezing of metals or of simple organisms. Metals get stronger (40) deep freezing, while the freezing and thawing of cancerous tissues can be a good way (41) kill it.
    (42) cryonics seeks to do the opposite. The goal is to freeze a human head or an entire body (43) the technology exists to do one of the following: graft a new body (44) the head, clone a new person (45) preserved DNA, or heal a sick body that has been preserved. If this sounds like science fiction, (46) the moment it is.
    Anyone who has (47) put beer in the freezer and then forgotten about it can grasp the problems facing cryonics enthusiasts today. Ice is less dense than water. (48) as beer left to freeze will eventually cause its container to burst, (49) the ice that forms adds extra pressure, (50) frozen cells can risk being punctured when the liquid in them freezes.

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