1·While mom fished for salmon at the falls this yearling cub got a bit nervous with all of the large boars in the area and climbed to safety in a tree.
尽管妈妈在瀑布里捕捞到一岁的小动物-鲑鱼,可是因为在这个区域里很多大熊,她感到有些紧张,为了安全而爬上了树上。
2·Yearling first-time mothers had sons 57% of the time, but by the time those mothers were seven, this figure had changed to 67%.
一岁的母羚羊第一次分娩的所有子代中,雄性比例为57%,但是当母羚羊7岁时,这一比例上升到67%。