Along with those that had more recently come to the fore. 也有最近才崭露头角的角色
that the dinosaurs had become more successful than ever before. 以至于恐龙取得了前所未有的成功
for more than a hundred million years. 哺乳动物获得了非凡的防御能力
Today, there are more than 3,000 species of snake. 如今世界上有超过3000种蛇
giving them more time to raise their young as part of a family. 这让它们有更多时间 来照顾作为家庭成员的幼崽
there were more species on land than in the oceans. 这在地球历史上是第一次
Today, there are ten times more flowering plants 如今 开花植物的数量
At dusk, the flower opens once more. 黄昏时分 花再次张开