48) trans- transaction , transatlantic, transcend , transfer, transform, transistor , transit , transition , translate, translation, transmission, transmit, transmitter, transparent, transplant, transport, transportation

　　49) under- underdevelop, underdevelopment, underestimate, undergraduate, underground, underlie , underline, undersea, underlying , undermine , underneath, underwear

　　50) neo- neo-Nazism, neolithic

　　51) be- befriend, belittle

　　52) bio- biology, biography , autobiography, antibiotic, biochemistry, biosphere, biomedical

　　53) en- em- embody, empower, endanger, enlarge, enrich, encompass, enthrone, entrench

　　54) extra- extracurricular, extraordinary

　　55) mid- midday, midnight

　　56) poly- polycentric, polydirectional, polysyllabic

　　57) pseudo- pseudomemory, pseudonym, pseudoscience

　　58) thermo- thermochemistry, thermometer

　　59) vice- vice-chairman, vice-president

　　60) aero- aerial , aeroplane, aeronautics, aerospace

　　61) cross- cross-country, crossbreed

　　62) intra- intracity, intra-department, intranet

　　18) gram, graph diagram, telegram, program, photograph, geography, telegraph

　　19) insul insulate, insulator , insular, peninsula

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