There may be, there probably are, thousands of deposits still untouched containing countless fragments and vestiges of man and his progenitors. 赫伯特·乔治·威尔斯.世界史纲.
Small portable clocks, the progenitors of the modern watch, commenced to appear about 1500. 威廉·亨利·杜利特.世纪发明.
One's mind hurries back over past centuries, and then asks, could our progenitors have been men like these? 李贝.西洋科学史.
The gunpowder experiments of Huygens and Papin were not successful, but they were the progenitors of similar inventions made two centuries thereafter. 威廉·亨利·杜利特.世纪发明.
I hope that I may not be misconstrued into saying that the progenitors of whales did actually possess mouths lamellated like the beak of a duck. 查尔斯·达尔文.物种起源.
I believe that animals are descended from at most only four or five progenitors, and plants from an equal or lesser number. 查尔斯·达尔文.物种起源.