Bond refractivity

bond [bɑnd]

n. 纽带;联系;债券;保释金; v. 使结合;建立互信关系;与…紧密联系;与…黏合;

bond(to bind)→束缚；债券；契约；保证人

refractivity

折射本领, 折射率, 折射性

Glad to meet you too.

我也很高兴认识你。

Two blacks do not make a white.

两个乌黑不等于一个清白。

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。