
作业
1告诉我我读的是英音还是美音?
2 仔细听我的元音和尾音,找找有没有我经常给你们纠错的地方
我标注的地方要重点听
ONE of the unresolved—and rather bitter—disputes in evolutionary biology is between the creeps and the jerks. The creeps (so dubbed by the jerks) think that evolutionary change is gradual. The jerks (so dubbed by the creeps) think it happens in sudden jumps that are separated by long periods of stasis.
Probably, both are true. Work done a couple of years ago by Mark Pagel of Reading University, in England, suggests that about a fifth of evolutionary change happens jerkily at around the time new species form. The rest creeps in gradually over the millennia.
Species, however, are not the only things that evolve. Languages do too. And in the current edition of Science, Dr Pagel and his colleagues publish evidence that they do so in a way which looks intriguingly similar to what happens in species.
[本贴已被 NSPPP 于 2008-02-21 04:03:17 修改过]
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