they are the tallest living things to have ever existed. 是史上最高的生物
allowing them to grow bigger and stronger than ever before. 使植物能够生长得比以往任何时候 都更大、更强壮
No longer confined to carpeting the land, 不再局限于覆盖地面
plants began to battle for the real estate above, 植物开始争夺向上的空间
paving the way for plants to take over. 为植物的到来铺平道路
Micro plants, like moss, were first to appear. 苔藓这样的微型植物率先出现
...their tiny filaments helped to break down rock 它们的细丝帮助将岩石分解
had what it took to overcome the extreme hostility of barren Earth. 才能克服贫瘠地球的极度险恶
one curious life-form was among the first to rise to the challenge. 有一种好奇的生物率先发出挑战