So, as a descriptive term, " living fossil" doesn't seem very useful, at least on smaller geologic time scales.

因此，作为一个描述性术语， “活化石” 似乎并不是很有用，至少在较小的地质时间尺度上是这样。

As we end this module on geologic time here's another chance to interact with the geologic time scale.

当我们结束这个关于地质时间的模块时，这是另一个与地质时间尺度互动的机会。

The carbon remains trapped there until those animals die and their structures break down, which happens on huge, very slow, geologic time scales.

碳一直被困在那里， 直到那些动物死亡并且它们的结构崩溃，这发生在巨大的、非常缓慢的地质时间尺度上。