and are no larger than a grain of rice. 而且只有一粒米那么大
And with oxygen levels 60% higher than they are today, 当时的氧气水平比今天高60%
But redwoods are just one of more than 400,000 species of plant, 但是红杉只是40万植物物种中的一个
Reaching heights of more than a hundred meters, 高度超过100米
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
But they were more than just pioneering. 但它们不仅具有开创性
where life had thrived for more than a billion years, 生命已在这里繁荣超过10亿年
They first appeared more than 400 million years ago 它们最早出现在四亿多年前