那时候，燧人发现了钻木取火的方法，但他并了解如何长时间地保住以及利用火种。

At that time, Suiren discovered the method of making fire by drilling wood, but didn't know much about keeping and utilizing fire.

youdao

那时候，燧人发现了钻木取火的方法，但他并了解如何长时间地保住以及利用火种。

At that time, Suiren discovered the method of making fire by drilling wood, but didn't know much about keeping and utilizing fire.

youdao