1.representation n.代表(one that represents)

词根记忆：来自represent(v.代表；标志)

例：All of the animal figures in the Sepphoris mosaics are readily identifiable as representations of known species.

同根词：representative(a．典型的；n．代表)

2.representative n.代表(one that represents another or others delegate)；a．(of)有代表性的，典型的(serving as a typical or characteristic example)

例：House of Representatives众议院，//The students who didn't protest are more representative of the state's college students.

3.reproduce v.繁殖（to have offspring or young）；复制(to make a copy or equivalent of)

词根记忆：re（再）+produce(生产)--不断生产--繁殖；复制

例：They can reproduce several times each year and produce large numbers of offspring.

派生词：reproducer(n．复制程序；再生器)

同根词：productive(a．多产的)

4.reproduction n.再生产(the act or process of reproducing)

词根记忆：re(再)+production(生产)--再生产

例：Paleontologist Stephen Jay Gould has argued that many biological traits are not the products of natural selection, favored because they enhance reproduction or survival, but are simply random by-products of other evolutionary developments.

5.reptile n.爬行动物(any of a class of cold-blooded egg-laying animals including crocodiles, lizards snakes, turtles, etc. with relatively short legs or no legs at all)

词根记忆：rept(爬)+ile--爬行动物

例：Although scales typically cover rept17es, the pterosaurs(翼龙)probably had hairy coats.

派生词：reptilian(a．爬虫类的；卑下的)

6.republican n.共和主义者(one that favors or supports a republican form of government)；a．共和国的(of, relating to, or having the characteristics of a republic)

词根记忆：republic(共和政体，共和国)+an(表…的)--共和国的

例：Introduction of the republican motherhood thesis dramatically changed historiography.

派生词：republicanism(n．共和主义)

7.repudiate v.拒绝(to decline)；拒付(to refuse to pay)

联想记忆：re(反)+pudi（感到羞耻）+ate--反过来让对方羞耻--拒绝（别人）

例：The innocent man repudiated the charge of murder.//repudiate a debt 赖债

派生词：repudiation(n．拒付)

8.rescind v.废除（法律等）(to repeal)

词根记忆：re(反)+scind(=cut)砍--砍掉--废除

例：The outdated law was rescinded by the federal government.

9.resemble v.类似于，像(to be like or similar to)

词根记忆：re+semble(类似)---类似于

例：The pterosaurs resembled both birds and bats in their overall structure and proportions.

派生词：resemblance(n．相似；相似处)