Australopithecus was a group of early hominids that is reckoned to be the ancestral genus of Homo, to which modern man b南方古猿是早期原始人类的一部分，被认为是祖先人种，现代人就由此而来。
Research by Robert Sussman, of Washington University, St Louis, has identified that teeth belonging to an older species 说明：在整个教学过程中教师只是指导者，整个学习过程主要都由学生自己掌握，这样可增加他们的学习积极性和自主性。