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.
盡管北京很快就以其龐大的體量、復雜的社會體系和它永無休止的活力讓我應接不暇，但是最早的、印象最深的便是那煙霧。

Their ceaseless circulation spreads ideas and expertise as the body's blood spreads oxygen and glucose.
他們不停的流動輸送了理念和專業知識，就好像身體的血液輸送氧和葡萄糖。

2.feverish 高度活躍或興奮的；容易引起熱病的

The market reacted with a new high for the feverish market.
市場的反應是讓狂熱的市場再創新高。

The lending initially triggered feverish speculation in real estate and stocks.
這筆借款最初激發了在房地產和股票上狂熱的投機。

3.mystic n.神秘主義者

If you're looking for something more mystic, consider taking a trip to ireland.
如果你尋找更有神秘感的地方，考慮去愛爾蘭旅游。

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.
也有一個說法是，它的名稱是由steven jobs在一次前往神秘東方的旅行后，根據他從那里帶回來的果齋食譜定下的。

4.premium n.費用，額外費用

How much of the price premium goes to producers?
到底有多大比例的溢價流進生產者的腰包？

That is effectively an insurance policy with a very expensive premium.
這事實上就是買了一份保險，不過保費卻相當高昂。