1. [望文生义]根据所学词根的知识推测下列单词的词义。
recycle v.&n.
2. [寻根问底]指出下列单词的词根并领会其词义的由来。
① cycloid a.圆形的；圆状的
② cyclist n.骑自行车的人
③ encyclic a.普遍传送的
④ encyclical n.通谕；通告
⑤ anticyclone n.反气旋
⑥ cyclopaedia n.百科词典；百科全书
⑦ cyclorama n.圆形连续画景
⑧ megacycle n.兆周（提示：mega=million）
3. [节外生枝] cyclo-可作为术语前缀，表示“圆的”，“环状的”。请分析下列单词词义与“圆”，“环”的关系。
① cyclograph n.全景电影摄影机；圆弧规
② cyclometer n.车轮转数记录器
③ cyclostome n.圆口类脊椎动物
④ cyclothymia n.循环性精神病
⑤ cyclotron n.原子能回旋加速器
25. dem [GK]=the people人民
dem源于希腊名词demos，意思相当于the people（人民）。在添加后缀时，它常带有连接字母-o-，可以把demo当作dem的异体。
democracy [demo=the people人民；-cracy n.=power权力→rule or ruling body统治，政体→“rule or ruling body by the people人民的统治或政权”→] n. government by all the people;society characterized by recog-nizing the equal rights of all the people民主政权；民主社会
democrat [demo=the people人民；-crat n.=supportor of a government某种政体的支持者→“supportor of a government by all the people人民政权的支持者”→] n. supportor or advocate of democracy民主主义者
▽democratism [democrat;-ism n.] n.民主主义
democratic [democrat;-ic a.] a.民主主义的；民主政体的
democratize [democrat;-ize v.] v.使民主化
demos [demos=the people人民→] n. the people;the populace人民，民众；大众
▽demotic [dem(os);-otic a.] a.民众的；通俗的
demography [demo=the people人民→the population人口；-graphy n.=writing著作→recording and study记录与研究→“the recording and study of the population对人口的记录与研究”→] n. the study of statistics of births, deaths, disease, etc.人口统计学
▽demographic [demograph(y);-ic a.] a.人口统计的
demographer [demograph(y);-er n.] n.人口统计学者
demagogue [dem=the people人民；agogue=leader引导者→“leader of the people民众领袖”→] n. political agitator appealing to desires of the mob蛊惑民众的政治鼓动家
▽demagogic [demagog (ue);-ic a.] a.蛊惑的；煽动的
demagogism [demagog(ue);-ism n.] n.煽动；煽动主义
demagogy [demagog(ue);-y n.] n.煽动；煽动性宣传
epidemic [epi-=upon在……之上；dem=the people民众；-ic a.=being……的→“being upon the people 发生在民众身上的”→] I a. prevalent among the people in a certain place at a certain time流行性的：Polio was once an epidemic disease.小儿麻痹症曾是一种流行性传染病。→Ⅱn. epidemic disease流行病：to prevent epidemics预防流行病
endemic [en-=in在……之中；dem=the people人民；-ic a.=being……的→“being in the people of a certain area存在于某个地区民众中的”→] I a. prevalent in a particular area or nation某地（或某种人）特有的，地方性的：Cholera was an endemic disease in India.霍乱曾是印度特有的地方病。→Ⅱn. disease of an endemic nature地方性流行病；风土病：Some endemics have become epidemic diseases in the world.有些地方性疾病已变成世界性的流行病。
▽endemicity [endemic a.;-ity n.] n.地方性；风土性
pandemic [pan-=whole全，遍；dem=the people人民；-ic a.=pertaining to……的→“pertaining to the whole people涉及全民的”→] a. prevalent over the whole of a country or the whole world流行全国（或全世界）的：a pandemic influenza世界性流感
