In times of prosperity money circulates quickly, but during a depression it ciculates slowly.货币在繁荣时期流通得很快，而在萧条时期则流通得很慢。

circumference n.圆周；周长

The highway was built on the circumference of the city.高速公路绕这座城市而建。

circumstance n.环境，情况

We need to know the exact circumstances surrounding the accident.我们需要要知道事故发生地周围的具体情况。

cite vt.引用；举例

The boss cited Bill’s excessive absences when he fired him.老板在解聘比尔的时候，提到了他多次缺勤的事。

clarify vt.澄清，阐明

The explanation clarifies the details of the plan.解释阐明了计划的细节。

classical adj.古典的，正统的

We are rapidly nearing the end of this course on the history of classical music.我们很快就要结束古典音乐史这门课程了。

classify vt.把…分类，分等级

Scientists had never seen that kind of insect before and they did not know what to classify it under.科学家之前从未见过这种昆虫，所以他们不知道该将其归入哪一个种类。

clause n.从句；条款

The sentence had too many clauses in it.这个句子里面有太多从句。

clue n.线索

Police are searching the area for clumsy to the murder.警方正在调查这个区域，寻找与凶杀案有关的线索。

clumsy adj.笨拙的；愚笨的

People laughed at the clumsy elephant at the zoo.动物园里笨拙的大象引得人们大笑。