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  3. Doctors are of the opinion that most people cannot live beyond 100 years，but a growing number of scientists believe that the agi

Doctors are of the opinion that most people cannot live beyond 100 years，but a growing number of scientists believe that the agi

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问题 Doctors are of the opinion that most people cannot live beyond 100 years，but a growing number of scientists believe that the aging process can be controlled．There are more than 12，000 Americans over 100 years old，and their numbers are increasing each year．Dr．James Langley of Chicago claims that，theoretically and under ideal conditions，animals，including man，can live six times longer than their normal period of growth．
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答案医生们认为大多数人都无法活到一百岁以上，但是越来越多的科学家相信衰老过程是可以被控制的。在美国，已有一万二千多个人的寿命超过了一百岁，这个数字每年还在增加。芝加哥的詹姆斯·兰格利医生声称，理论上来说，在理想的条件下，动物，包括人，都可以活到其通常寿命的六倍以上。
解析 本文是一片说明文，主要说明了人的寿命可以在某种理想的条件下延长。翻译时要注意句子的结构和句子之间的逻辑关系。
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