“绝灭”造句
于是,这种鹿便在中国
绝灭了.
So the deer perished in China.
这样一来却使它们免于
绝灭.
In doing so they were saved from extermination.
化石与现存类型之间的这种依赖关系在我们研究
绝灭类群时是十分明显的.
This dependency between fossil and living types is well illustrated when we deal with extinct groups.