Only one of every three job seekers finds a job, but the overproduction is probably worthwhile, for it ensures that as a replaceable neuron dies, there will already be, in its vicinity, a younger one ready to take its place.

每三个迁徙来的神经细胞中只有一个会替代死细胞，但是这种过量繁殖也许是有价值的，因为它能保证当一个可被替代的细胞死去时，在其附近，总有一个年轻的新细胞准备替代它的 位置。

© Project Syndicate 1995 – 2011

http://www.project-syndicate.org/ 23.02.2009

© Project Syndicate 1995 – 2011

http://www.project-syndicate.org/ 23.02.2009