1.ceaseless 不停的

Beijing would very quickly overwhelm me with its size its complexity and its ceaseless activity too but before and on top of everything else there was the smog.
尽管北京很快就以其庞大的体量、复杂的社会体系和它永无休止的活力让我应接不暇，但是最早的、印象最深的便是那烟雾。

Their ceaseless circulation spreads ideas and expertise as the body's blood spreads oxygen and glucose.
他们不停的流动输送了理念和专业知识，就好像身体的血液输送氧和葡萄糖。

2.feverish 高度活跃或兴奋的；容易引起热病的

The market reacted with a new high for the feverish market.
市场的反应是让狂热的市场再创新高。

The lending initially triggered feverish speculation in real estate and stocks.
这笔借款最初激发了在房地产和股票上狂热的投机。

3.mystic n.神秘主义者

If you're looking for something more mystic, consider taking a trip to ireland.
如果你寻找更有神秘感的地方，考虑去爱尔兰旅游。

One story has it that the name was chosen by steven jobs in honor of the fruitarian diet he had brought back from his journey to the mystic east.
也有一个说法是，它的名称是由steven jobs在一次前往神秘东方的旅行后，根据他从那里带回来的果斋食谱定下的。

4.premium n.费用，额外费用

How much of the price premium goes to producers?
到底有多大比例的溢价流进生产者的腰包？

That is effectively an insurance policy with a very expensive premium.
这事实上就是买了一份保险，不过保费却相当高昂。