单词	extra-
释义	extra-extra- /ekstrə/ prefix Word Origin WORD ORIGINextra- Origin: Latin extra ‘outside’, from exter; ➔ EXTERNAL Examples EXAMPLES FROM OTHER DICTIONARIES extracurricular activities extramarital sex 1outside or beyond:  extragalactic (=outside our galaxy) extracellular (=outside a cell)2informal very or more than normal:  extra-large extra-strong extra-special
随便看	supremo Supt. surcharge sure surefire sure-footed surely sureness surety surf surface surface area surface mail surface tension surface-to-air missile surface-to-surface missile Surface Transportation Board surfboard surfeit surfer surfing surf 'n' turf surge surgeon Surgeon General

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