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(返老还童)

2018-09-15 1页 doc 11KB 12阅读

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(返老还童)(返老还童) Aging Backward (返老还童) We are used to the ideas of aging ourselves. We are so used to this that it comes as a surprise to find that there may be some animals that do not age. Sea anemones(海葵) are an example. Some have been kept for nearly a century without...
(返老还童)
(返老还童) Aging Backward (返老还童) We are used to the ideas of aging ourselves. We are so used to this that it comes as a surprise to find that there may be some animals that do not age. Sea anemones(海葵) are an example. Some have been kept for nearly a century without showing any signs of losing vigour(精神;活力). Some kinds of marine (海的)worm can even “grow backward”. If starved(饿)and kept in the dark, they get steady (稳定的;持续的)smaller. They finally end as a ball of cell(细胞;小室;s 单人牢房), looking rather like the egg grom which they came. Under favourable(赞成的; 有帮助的) conditions the ball will turn back to a worm and start growing again. One could probably keep them growing and “ungrowing” indefinitely(模糊地;不确定地;无限期地).
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