我相信北京猿人中后期已经掌握了人工取火技术，从那时算起到火的广泛应用，也经历了几十万年的时间。

I believe that Peking Man had grasped the technique of making fire at their middle and late period of life, but from that time to using fire widely also cost several hundred thousands of years.

youdao

我相信北京猿人中后期已经掌握了人工取火技术，从那时算起到火的广泛应用，也经历了几十万年的时间。

I believe that Peking Man had grasped the technique of making fire at their middle and late period of life, but from that time to using fire widely also cost several hundred thousands of years.

youdao