translation.en: But in just a tiny sliver of the Earth's history, the last one-millionth part, a few thousand years, the patterns of vegetation altered much faster than before.
translation.zh: 但在地球历史的短短一瞬， 其百万分之一的时间部分，也就不过是近几千年里， 植被产生了比以往快得多的变化。