As such, these puny foraminifera serve as very distinct tags of when the K-T extinction event started.

因此，当K-T灭绝事件开始时这些微小的有孔虫充当十分鲜明的标签。

youdao

As such, these puny foraminifera serve as very distinct tags of when the K-T extinction event started.

因此，当K-T灭绝事件开始时这些微小的有孔虫充当十分鲜明的标签。

youdao