The most successful are then mutated again, in a process similar to biological evolution.
最成功的继续变异，如同生物进化的过程。
Before the existence of human, the process of biological evolution is accompanied with species extinction.
人类出现之前，生物进化的过程中就伴随着物种的灭绝。
T he process of biological evolution was very slow at first.
起初，生物进化的过程相当缓慢。
T he process of biological evolution was very slow at first.
起初，生物进化的过程相当缓慢。
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