Ultra-rapid vulcanization

ultra [['ʌltrə]]

a. 过分的, 极端的\\nn. 极端主义者, 过激论者, 急进论者

rapid ['ræpɪd]

adj. 快速的;[摄]感光快的;险峻的; n. 急流;高速交通工具，高速交通网;

rap-, rav- Rap,rapt,rav=snatch,表示”捕,夺”#词根助记：抢夺时速度必然很快

vulcanization

n. 硬化, 硫化\\n[化] 硫化

or we won't be finished by dinnertime.

要不然， 晚餐时间到了我们还做不完。

Don't mention it.

不必客气。

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。