The equivalent vitrinite reflectance and aromatic maturity parameters showed that most Ordovician source rocks were highly mature, and some of them were mature or over mature.

等效镜质组反射率及芳烃成熟度参数显示济阳坳陷奥陶系烃源岩大多达到高成熟阶段，部分达到成熟、过成熟阶段。

youdao

First came the remarkable work of Shinya Yamanaka at Kyoto University, who showed it was possible, by activating just four genes, to take a mature cell (he used a bit of skin but other cells would work) and turn it into the equivalent of an embryonic stem cell with the potential to become any other cell in the body of mouse or human.

FORBES: Cells Get a Makeover, Cancer Follows: A Path to New Therapies (and a Warning to Stem Cell Alchemists)