单词	ultra-
释义	ultra-ultra- /ʌltrə/ prefix Word Origin WORD ORIGINultra- Origin: Latin ultra ‘beyond’, from ulter; ➔ ULTERIOR Examples EXAMPLES FROM OTHER DICTIONARIES an ultramodern building ultraviolet light 1extremely:  an ultra-modern building He remained ultra-cautious. an ultra-light jacket2technical above and beyond something in a range:  ultrasound (=sound that is too high for humans to hear) → infra-
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