Those were events antecedent to the revolution.

这些都是革命前事了。

No one knew the antecedents of the mysterious stranger.

谁也不知道那个神秘陌生人身世。

That was antecedent to this event.

那是在这件事之前。

Thus "DGT cores" are an antecedent of the microlithic tradition in China, East Asia, North Asia and North America.

同时，也提出了旧石器技术研究新课题——对劣质原料实验研究。