It was a skill developed during the Stone Age.这一技能是在石器时代发展起来的。

Stone Age weapons石器时代的武器

His political ideas are from the Stone Age. [=are from the distant past; are very out of date]他的政治思想早就过时了。

I'm still using a Stone Age computer. [=an outdated/obsolete computer]我还在用老掉牙的电脑。