Optic disc

optic ['ɔptik]

adj. 眼睛的，视觉的;光学的;镜片;

disc [disk]

n. 圆盘;唱片;磁盘;

Ellen, why don't you go out to the backyard

Ellen，何不去院子

You may leave it to me.

交给我来办。

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。