1.circulate v.散布，傳播(to cause to become widespread)

詞根記憶：circ(圓)+ul+ate(做)--繞圈走--散布，傳播

例:The proposal to amend the bylaws of an organization was circtAated to its members for comment.

派生詞：circulation(n．循環：傳播)

2.circulation n.循環，流通(the process of going round continuously)；發行額(the average number of copies of a publication sold over a given period)

詞根記憶：來自circulate(讓循環，流通i散布)

例:The circulation of the poetry was confined to young Quaker women.

同根詞：circus(n.圓形廣場；馬戲團)

3.circulatory a.循環的(of or relating to circulation or the circulatory system)

詞根記憶：來自circular(a．圓形的；循環的)

例:A peculiar feature of the embryonic mammalian circulatory system is that in the area of the heart the cells adhere to one another, beating in unison and adopting specialized orientations exclusive of one another.

同根詞：circulative(a．循環性的；促進循環的)

4.circumference n.圓周;圓周長(the perimeter of a circle)

詞根記憶：circum(環繞)+fer(帶來)+ence--帶來一圈--圓周長

例:There are cogs around the circumference of a wheel.

同根詞：circumspect(a.仔細的)；circumstance(n.環境)； circumstantial（a.不重要的）

5.circumspect a．謹慎的(cautious)

詞根記憶：circum(環繞)+spect(看)--繞著看--謹慎的

例:The investor was circumspect when making predictions about the economy.

6.circumstance n.環境;事件(a condition, fact, or event)

詞根記憶：circum(周圍)+stance(站)一周圍的存在一環境

例:The first is a circumstance for which the astronomer seeks to provide an explanation.

同根詞：circumfluence(n.環流)

7.circumvent v.環繞(to make a circuit around)；回避，規避(to manage to get around)

詞根記憶：circum(環繞)+vent(來)--繞著圈兒來規避--規避

同Immigrants could circumvent such exclusionary laws by leasing or purchasing land in their American-born children's names.

派生詞：circumvention(n.規避)

8.citywide a．全市的，全市性的(including or involving all parts of a city)

分拆記憶：city(城市)+wide(廣泛的)--全市的

例:Yet the fact is that not only were more jobs created than were eliminated, but the average pay for these new jobs has been higher than the average pay for jobs citywide every year since Delmont took office.

9.civic a．城市的(municipal);公民的；平民的(of citizens or citizenship)

例:cwic symbols城市象征//ciwc virtues公民道德//civic education平民教育

10.civilization n.文明，文化(a relatively high level of cultural and technological deve-lopment)

詞根記憶：來自civilize(v.使文明；使開化)

例:Confused by the many strata and substrata of ancient crvilizations overlying one another, Schliemann temporarily halted his excavations of the fabled city of llium, the ancient Troy.