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。

Many of these obligations can give rise to problems and complications but a bank customer,

其中许多义务往往引起问题和纠纷。

Knowledge began to increase as soon as the thoughts of one individual could be communicated to another by means of speech.

人一旦能用语言同别人交流思想，知识的积累便开始了。

In his mouth were the remains of fir trees -- the last meal that he had before he fell into the crevasse and broke his back.

它嘴里还留着冷杉 -- 它掉进冰河裂隙折断脊椎柱之前的最后一顿饭。

It has yet to reach its full size and strength,

虽然在这个时期人的身材、体力

at eighty can knock us out, and into our grave.

能到了80岁可能会使我们一蹶不振而进入坟墓。