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来源:雅诚德英语网
For example, during past ice ages, glaciers advanced down through North America and Europe and gradually cut off parts of populations from one another.
例如,在过去的冰河时代,冰川向下穿过北美和欧洲,逐渐切断了部分人口之间的联系。
For example, during past ice ages, glaciers advanced down through North America and Europe and gradually cut off parts of populations from one another.
例如,在过去的冰河时代,冰川向下穿过北美和欧洲,逐渐切断了部分人口之间的联系。