Prophylaxes

Easy does it, tom. don't get all worked up.

冷静点，汤姆，不要太激动。

Over 5,000 hours of work went into this software, and today it's my privilege to bring it to you.

这种软件的研制超过5000工作小时，今天我很荣辛地向你们展示它。

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。