文档介绍：roof roofs gulf gulfs grief griefs cliff cliffs beef beefs chief chiefs proof proofs staff staffs man men woman women fireman firemen foot feet goose geese tooth teeth mouse mice louse lice child children ox oxen auto autos kangaroo kangaroos kilo kilos memo memos photo photos piano pianos pimento pimentos pro pros con cons solo solos, soli soprano sopranos studio studios tattoo tattoos video videos zoo zoos bamboo bamboos echo echoes embargo embargoes hero heroes potato potatoes tomato tomatoes torpedo torpedoes veto vetoes negro negroes buffalo buffal os buffal oes buffal o水牛 cargo cargos cargoes halo halos haloes 光环 mosquito mosqu itos mosqu itoes 蚊子 motto mottos mottoes 箴言, 格言 no nos noes tornado tornad os tornad oes 龙卷风 volcano volcan os volcan oes 火山 zero zeros zeroes m m andoes 突击员 cod cod deer deer fish fish offspring offspri ng 子孙, 后裔,幼崽 perch perch sheep sheep trout trou bison bison moose moose aircraft aircraf t 飞机, 飞行器 barracks barrac ks 兵营 crossroads crossr oads 十字路口 dice dice gallows gallow s 绞刑架 headquarter s headq uarters 总部 means means series series species specie s 物种 alga algae amoeba amoeb ae, amoeb as变形虫 antenna antenn ae, antenn as触角,天线 formula formul ae, formu las 公式 larva larvae nebula nebulae , nebulas 星云 vertebra vertebr ae, verteb ras 脊椎骨 alumna alumn ae 女校友 beau beaux, beaus bureau bureaux, bureaus 局,机构 tableau tablea ux, tablea us舞台造型,场景 plateau platea ux, platea us高原,平顶 corpus corpora genus genera alumnus alumni bacillus bacilli cactus cacti, cactuses 仙人球, 仙人掌 focus foci fungus fungi, funguses 真菌 nucleus nuclei octopus octopi, octop uses 章鱼 radius radii, radiuses stimulus stimuli syllabus syllabi , syllab uses 大纲,提纲 terminus termin i 终点, 目标,界碑 hippopotam us hippop otami 河马 genius genii, geniuses 天才 abacus abaci, abacuses 算盘 addendum adden da 附录,补遗 bacterium bacteri a 细菌 curriculum curricu la, curricu lums 总课程 datum data erratum errata medium media memorandu m memor anda, memor andum s备忘 ovum ova stratum strata, stratu ms 岩层,地层,阶层 sympos