Human evolution is the lengthy process of change by which people originated from apelike ancestors. Scientific evidence shows that the physical and behavioral traits shared by all people originated from apelike ancestors and evolved over a period of approximately six million years.
人类是从类人猿进化来的，人类的进化是一个漫长的过程。科学的证据表明，人类共有的生理上的特征和行为上的特征说明了我们是从类人猿进化来的，经历了大概六百万年才得以形成。
One of the earliest defining human traits, bipedalism -- the ability to walk on two legs -- evolved over 4 million years ago. Other important human characteristics-- such as a large and complex brain, the ability to make and use tools, and the capacity for language -developed more recently. Many advanced traits--including complex symbolic expression, art, and elaborate cultural diversity --emerged mainly during the past 100,000 years.
直立行走这一最早的特征出现于四百万年前。其他一些大的特征，比如有大且复杂的人脑，使用工具的能力，语言能力则进化的较晚。许多其他高级的特征，比如复杂的象征性的表达，艺术，文化的多样性几乎都是在近10万年间形成的。
Humans are primates. Physical and genetic similarities show that the modern human species, Homo sapiens, has a very close relationship to another group of primate species, the apes. Humans and the great apes (large apes) of Africa -- chimpanzees and gorillas -- share a common ancestor that lived between 8 and 6 million years ago. Humans first evolved in Africa, and much of human evolution occurred on that continent. The fossils of early humans who lived between 6 and 2 million years ago come entirely from Africa.
人类是灵长类动物的一种，现代人种智人和另一种早期灵长类人种，猿有着非常密切的关系，无论是在身体上还是在基因上，都有很大的相似度。人类与猩猩、大猩猩有着共同的祖先，它生活在距今600至800万年前。人类起源于非洲，人类进化也主要发生在非洲大陆。生活在距今200至600万年前的早期人类,其化石均出土于非洲。
Most scientists currently recognize some 15 to 20 different species of early humans.Scientists do not all agree, however, about how these species are related or which ones simply died out. Many early human species -- certainly the majority of them – left no living descendants. Scientists also debate over how to identify and classify particular species of early humans, and about what factors influenced the evolution and extinction of each species.
目前，大多数科学家认为存在15-20种不同的早期人种，这些人种是怎么联系的？灭绝的人种有哪些？许多早期的人种，绝大多数，没有留下后代，如何辨别和区分早期人类特定的人种？什么因素影响了人种的进化和灭绝？这些在学术界引起了争议。
Early humans first migrated out of Africa into Asia probably between 2 million and 1.8 million years ago. They entered Europe somewhat later, between 1.5 million and 1 million years. Species of modern humans populated many parts of the world much later.
早期人类可能是在距今180万年前到200万年前从非洲迁徙到亚洲的，后来大约在距今100万年前到150万年前到达了欧洲，而现代人类定居于世界各个地区繁衍生息则是晚的多的事了。
