Phosphorization

I think something he can use is the best. A watch or something.

最好是实用的，像手表啦或什么的。

A scientist has come up with a good idea. That's it!

科学家想起了一个好创意。就是这个！

The only way that they can preserve their history is to recount it as sagas -- legends handed down from one generation of another.These legends are useful because they can tell us something about migrations of people who lived long ago, but none could wri

他们保存历史的唯一办法是将历史当作传说讲述，由讲述人一代接一代地将史实描述为传奇故事口传下来。