【四级】It is more costly than what our ancestors ate.
【考研】When our ancestors were hunters and gatherers 10,000 years ago, they didn’t have time to wonder much about anything besides finding food.
【考研】Perhaps that is why we explore the starry skies, as if answering a primal calling to know ourselves and our true ancestral homes.
【高考】Look to many of history's cultural symbols, and there you'll find an ancestor of frosty, the snowman in the movie frozen.
【考研】He notes that each individual has many ancestors-numbering in the hundreds just a few centuries back.
【高考】Your website has to do with the background of your ancestors and has to be 5 pages long.
【四级】My ancestor was a preacher, traveling around the countryside.
【考研】When the competitive environment pushed our ancestors to achieve that potential, they could in turn afford more education.
【高考】The bone structure of our ancestors developed for millions of years to support a creature that walked on all fours and has a relatively small head.
【考研】This DNA can reveal genetic information about only one or two ancestors, even though, for example, just three generations back people also have six other great-grandparents or, four generations back, 14 other great-great-grandparents.