求翻译：自从开天辟地，人类的脚步踏上大地以来，人类一直为改善自身的生活状况而做出努力，并渐渐地积累了许多丰富的经验，从中学到了许多知识和技能。我们的祖先在没有任何理论根据的前提下，学会了如何运用火烹食物、将锋利的石头制成兵器，从石器到陶器到青铜器、由原始社会过渡到封建社会，他们不了解各种岩石的化学成分，不清楚金属冶炼的化学原理，更没有人告诉他们哪一种社会制度更加完善，但是他们在接连不断的实践中摸索经验，使人类前进道路中的许多困难和障碍得到了解决，推动了社会的进步，战胜了种种天灾人祸，从而令人类成为了地球的主宰，成为万物之灵。是什么意思？

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Since the days of the land, the human race on Earth's footsteps, humanity has been to improve the living conditions of their own efforts, and gradually began to accumulate a wealth of experience, many from secondary school with a wealth of knowledge and skills. Our ancestors in the absence of any th

Since its creation, since human footsteps on the path of the Earth, humans have made efforts to improve their living conditions, and gradually accumulated much wealth of experience, learned a lot of