Infective material

infective [ɪnˈfɛktɪv]

adj. 会传染的;有传染性的;影响别人的;感染别人的;

material [mə'tɪrɪəl]

n. 材料，原料;素材;布，织物;适当人选; adj. 物质的;肉体的;重要的，决定性的;辩证的，推论的;

This dog is well trained.

这只狗受过很好的训练。

I would like to welcome you once again.

我向你们再次表示欢迎。

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。