long branch sequence

例句：

1. 1.The researchers found a long branch sequence in the fossil record that could explain the origin of modern humans.
   研究人员在化石记录中发现了一个长分支序列，可以解释现代人类的起源。
2. 2. The long branch sequence in the tree suggests that it has been growing for millions of years.
   树中的长分支序列表明它已经生长了数百万年。
3. 3. The long branch sequence is thought to be the result of natural selection and genetic drift.
   长分支序列被认为是自然选择和遗传漂变的结果。