论文部分内容阅读
有史以来,造成人类在种族、语言、文化等方面千差万别的原因中,主观的、人为的因素较少,主要的原因来自地理和气候的影响。 众所周知,从猿到人的进化过程经历了三百多万年。在地质纪年中,这一段时间被称为第四纪。在第四纪.出现了对地球影响巨大的第四季冰川期。其间,地球表面的气温几次大幅下降又回升,一个周期几十万年不等。最后一次下降的高峰在约五万年前,到约一万年前结束,所以今天地球表面的气候格局是近万年才形成的。
Among the reasons that cause mankind to differ greatly in their race, language and culture, subjective and human factors have historically been less, mainly due to the influence of geography and climate. It is well known that the evolution from ape to man has experienced more than three million years. In the geological year, this period of time is called Quaternary. In Quaternary, the fourth season of glaciation, which had a huge impact on the earth, appeared. In the meantime, the temperature of the Earth’s surface dropped and rebounded several times, a period of hundreds of thousands of years. The peak of the last decline came about 50,000 years ago, and ended about 10,000 years ago. Therefore, the climate pattern on the surface of the earth today is almost 10,000 years old.