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来源:雅诚德英语网
Completely Geographic isolation also can proceed slowly, over great spans of time.
完全的地理隔绝也可能在很长一段时间内缓慢地发展而成。
Completely Geographic isolation also can proceed slowly, over great spans of time.
完全的地理隔绝也可能在很长一段时间内缓慢地发展而成。