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来源:雅诚德英语网
The question about the rate of evolution must now be turned around: does evolution ever proceed gradually, or does it always occur in short bursts?
关于进化速度的问题现在必须解决:进化是逐步进行的,还是总在短时间内发生?
The question about the rate of evolution must now be turned around: does evolution ever proceed gradually, or does it always occur in short bursts?
关于进化速度的问题现在必须解决:进化是逐步进行的,还是总在短时间内发生?